texbodemer
Well-known member
<span style="font-family: 'times new roman', times; font-size: 12pt;">Here is some of the data from the shipping record, which I have reformatted slightly. My hunch is that serial number 75037 (May 1964) is the last 260-B before it was replaced with the 260-E. (It's circled and underlined on the shipping record.) </span>
<span style="font-family: 'courier new', courier;">---------------</span>
<span style="font-family: 'courier new', courier;">- Model 260 -</span>
<span style="font-family: 'courier new', courier;">---------------</span>
<span style="font-family: 'courier new', courier;">00101 *********** 02/57</span>
<span style="font-family: 'courier new', courier;">01450 *********** 02/57</span>
<span style="font-family: 'courier new', courier;">03206 *********** 03/57</span>
<span style="font-family: 'courier new', courier;">04468 *********** 04/57</span>
<span style="font-family: 'courier new', courier;">05192 *********** 05/57</span>
<span style="font-family: 'courier new', courier;">06159 *********** 06/57</span>
<span style="font-family: 'courier new', courier;">06826 *********** 07/57</span>
<span style="font-family: 'courier new', courier;">08294 *********** 08/57</span>
<span style="font-family: 'courier new', courier;">09429 *********** 09/57</span>
<span style="font-family: 'courier new', courier;">11187 *********** 10/57</span>
<span style="font-family: 'courier new', courier;">12387 *********** 11/57</span>
<span style="font-family: 'courier new', courier;">13955 *********** 12/57</span>
<span style="font-family: 'courier new', courier;">16202 *********** 01/58</span>
<span style="font-family: 'courier new', courier;">17229 *********** 02/58</span>
<span style="font-family: 'courier new', courier;">13955 *********** 03/58</span>
<span style="font-family: 'courier new', courier;">16202 *********** 04/58</span>
<span style="font-family: 'courier new', courier;">17229 *********** 05/58</span>
<span style="font-family: 'courier new', courier;">19031 *********** 06/58</span>
<span style="font-family: 'courier new', courier;">25740 *********** 07/58</span>
<span style="font-family: 'courier new', courier;">25934 *********** 08/58</span>
<span style="font-family: 'courier new', courier;">27011 *********** 09/58</span>
<span style="font-family: 'courier new', courier;">28228 *********** 10/58</span>
<span style="font-family: 'courier new', courier;">29847 *********** 11/58</span>
<span style="font-family: 'courier new', courier;">32117 *********** 12/58</span>
<span style="font-family: 'courier new', courier;">33175 *********** 01/59</span>
<span style="font-family: 'courier new', courier;">34707 *********** 02/59</span>
<span style="font-family: 'courier new', courier;">36059 *********** 03/59</span>
<span style="font-family: 'courier new', courier;">36944 *********** 04/59</span>
<span style="font-family: 'courier new', courier;">37914 *********** 05/59</span>
<span style="font-family: 'courier new', courier;">39348 *********** 06/59</span>
<span style="font-family: 'courier new', courier;">40278 *********** 07/59</span>
<span style="font-family: 'courier new', courier;">42291 *********** 08/59</span>
<span style="font-family: 'courier new', courier;">44284 *********** 09/59</span>
<span style="font-family: 'courier new', courier;">46642 *********** 10/59</span>
<span style="font-family: 'courier new', courier;">48029 *********** 11/59</span>
<span style="font-family: 'courier new', courier;">49427 *********** 12/59</span>
<span style="font-family: 'courier new', courier;">51564 *********** 01/60</span>
<span style="font-family: 'courier new', courier;">53309 *********** 02/60</span>
<span style="font-family: 'courier new', courier;">55756 *********** 03/60</span>
<span style="font-family: 'courier new', courier;">57331 *********** 04/60</span>
<span style="font-family: 'courier new', courier;">59563 *********** 05/60</span>
<span style="font-family: 'courier new', courier;">60836 *********** 06/60</span>
<span style="font-family: 'courier new', courier;">62357 *********** 07/60</span>
<span style="font-family: 'courier new', courier;">63615 *********** 08/60</span>
<span style="font-family: 'courier new', courier;">65511 *********** 09/60</span>
<span style="font-family: 'courier new', courier;">67660 *********** 10/60</span>
<span style="font-family: 'courier new', courier;">69961 *********** 11/60</span>
<span style="font-family: 'courier new', courier;">70062 *********** 12/60</span>
<span style="font-family: 'courier new', courier;">---------------</span>
<span style="font-family: 'courier new', courier;">- Model 260-A -</span>
<span style="font-family: 'courier new', courier;">---------------</span>
<span style="font-family: 'courier new', courier;">00101 *********** 12/60</span>
<span style="font-family: 'courier new', courier;">00601 *********** 12/60</span>
<span style="font-family: 'courier new', courier;">03600 *********** 01/61</span>
<span style="font-family: 'courier new', courier;">05401 *********** 02/61</span>
<span style="font-family: 'courier new', courier;">08684 *********** 03/61</span>
<span style="font-family: 'courier new', courier;">09632 *********** 04/61</span>
<span style="font-family: 'courier new', courier;">11958 *********** 05/61</span>
<span style="font-family: 'courier new', courier;">12977 *********** 06/61</span>
<span style="font-family: 'courier new', courier;">13455 *********** 07/61</span>
<span style="font-family: 'courier new', courier;">14784 *********** 08/61</span>
<span style="font-family: 'courier new', courier;">16272 *********** 09/61</span>
<span style="font-family: 'courier new', courier;">16419 *********** 10/61</span>
<span style="font-family: 'courier new', courier;">---------------</span>
<span style="font-family: 'courier new', courier;">- Model 260-B -</span>
<span style="font-family: 'courier new', courier;">---------------</span>
<span style="font-family: 'courier new', courier;">17101 *********** 10/61</span>
<span style="font-family: 'courier new', courier;">19530 *********** 10/61</span>
<span style="font-family: 'courier new', courier;">20930 *********** 11/61</span>
<span style="font-family: 'courier new', courier;">23333 *********** 12/61</span>
<span style="font-family: 'courier new', courier;">24041 *********** 12/61 ***** 1 carton</span>
<span style="font-family: 'courier new', courier;">25782 *********** 01/62</span>
<span style="font-family: 'courier new', courier;">27306 *********** 02/62</span>
<span style="font-family: 'courier new', courier;">28873 *********** 03/62</span>
<span style="font-family: 'courier new', courier;">31909 *********** 04/62</span>
<span style="font-family: 'courier new', courier;">34023 *********** 05/62</span>
<span style="font-family: 'courier new', courier;">35010 *********** 06/62</span>
<span style="font-family: 'courier new', courier;">35194 *********** 07/62</span>
<span style="font-family: 'courier new', courier;">36700 *********** 08/62</span>
<span style="font-family: 'courier new', courier;">38003 *********** 09/62</span>
<span style="font-family: 'courier new', courier;">40504 *********** 10/62</span>
<span style="font-family: 'courier new', courier;">41181 *********** 11/62</span>
<span style="font-family: 'courier new', courier;">43693 *********** 12/62</span>
<span style="font-family: 'courier new', courier;">45467 *********** 01/63</span>
<span style="font-family: 'courier new', courier;">47525 *********** 02/63</span>
<span style="font-family: 'courier new', courier;">48736 *********** 03/63</span>
<span style="font-family: 'courier new', courier;">50703 *********** 04/63</span>
<span style="font-family: 'courier new', courier;">53703 *********** 05/63</span>
<span style="font-family: 'courier new', courier;">54711 *********** 06/63</span>
<span style="font-family: 'courier new', courier;">55163 *********** 07/63</span>
<span style="font-family: 'courier new', courier;">55759 *********** 08/63</span>
<span style="font-family: 'courier new', courier;">56977 *********** 09/63</span>
<span style="font-family: 'courier new', courier;">59306 *********** 10/63</span>
<span style="font-family: 'courier new', courier;">60733 *********** 11/63</span>
<span style="font-family: 'courier new', courier;">63080 *********** 12/63</span>
<span style="font-family: 'courier new', courier;">65069 *********** 01/64</span>
<span style="font-family: 'courier new', courier;">67149 *********** 02/64</span>
<span style="font-family: 'courier new', courier;">70246 *********** 03/64</span>
<span style="font-family: 'courier new', courier;">73257 *********** 04/64</span>
<span style="font-family: 'courier new', courier;">75037 *********** 05/64 </span>
<span style="font-family: 'courier new', courier;">Notes: </span>
<span style="font-family: 'courier new', courier;">Entry for 05/1964 is circled and underlined. My best guess is that this serial number is the last number of the 260-B, marking the transition to the 260 E.</span>
<span style="font-family: 'courier new', courier;">---------------</span>
<span style="font-family: 'courier new', courier;">- Model 260 -</span>
<span style="font-family: 'courier new', courier;">---------------</span>
<span style="font-family: 'courier new', courier;">00101 *********** 02/57</span>
<span style="font-family: 'courier new', courier;">01450 *********** 02/57</span>
<span style="font-family: 'courier new', courier;">03206 *********** 03/57</span>
<span style="font-family: 'courier new', courier;">04468 *********** 04/57</span>
<span style="font-family: 'courier new', courier;">05192 *********** 05/57</span>
<span style="font-family: 'courier new', courier;">06159 *********** 06/57</span>
<span style="font-family: 'courier new', courier;">06826 *********** 07/57</span>
<span style="font-family: 'courier new', courier;">08294 *********** 08/57</span>
<span style="font-family: 'courier new', courier;">09429 *********** 09/57</span>
<span style="font-family: 'courier new', courier;">11187 *********** 10/57</span>
<span style="font-family: 'courier new', courier;">12387 *********** 11/57</span>
<span style="font-family: 'courier new', courier;">13955 *********** 12/57</span>
<span style="font-family: 'courier new', courier;">16202 *********** 01/58</span>
<span style="font-family: 'courier new', courier;">17229 *********** 02/58</span>
<span style="font-family: 'courier new', courier;">13955 *********** 03/58</span>
<span style="font-family: 'courier new', courier;">16202 *********** 04/58</span>
<span style="font-family: 'courier new', courier;">17229 *********** 05/58</span>
<span style="font-family: 'courier new', courier;">19031 *********** 06/58</span>
<span style="font-family: 'courier new', courier;">25740 *********** 07/58</span>
<span style="font-family: 'courier new', courier;">25934 *********** 08/58</span>
<span style="font-family: 'courier new', courier;">27011 *********** 09/58</span>
<span style="font-family: 'courier new', courier;">28228 *********** 10/58</span>
<span style="font-family: 'courier new', courier;">29847 *********** 11/58</span>
<span style="font-family: 'courier new', courier;">32117 *********** 12/58</span>
<span style="font-family: 'courier new', courier;">33175 *********** 01/59</span>
<span style="font-family: 'courier new', courier;">34707 *********** 02/59</span>
<span style="font-family: 'courier new', courier;">36059 *********** 03/59</span>
<span style="font-family: 'courier new', courier;">36944 *********** 04/59</span>
<span style="font-family: 'courier new', courier;">37914 *********** 05/59</span>
<span style="font-family: 'courier new', courier;">39348 *********** 06/59</span>
<span style="font-family: 'courier new', courier;">40278 *********** 07/59</span>
<span style="font-family: 'courier new', courier;">42291 *********** 08/59</span>
<span style="font-family: 'courier new', courier;">44284 *********** 09/59</span>
<span style="font-family: 'courier new', courier;">46642 *********** 10/59</span>
<span style="font-family: 'courier new', courier;">48029 *********** 11/59</span>
<span style="font-family: 'courier new', courier;">49427 *********** 12/59</span>
<span style="font-family: 'courier new', courier;">51564 *********** 01/60</span>
<span style="font-family: 'courier new', courier;">53309 *********** 02/60</span>
<span style="font-family: 'courier new', courier;">55756 *********** 03/60</span>
<span style="font-family: 'courier new', courier;">57331 *********** 04/60</span>
<span style="font-family: 'courier new', courier;">59563 *********** 05/60</span>
<span style="font-family: 'courier new', courier;">60836 *********** 06/60</span>
<span style="font-family: 'courier new', courier;">62357 *********** 07/60</span>
<span style="font-family: 'courier new', courier;">63615 *********** 08/60</span>
<span style="font-family: 'courier new', courier;">65511 *********** 09/60</span>
<span style="font-family: 'courier new', courier;">67660 *********** 10/60</span>
<span style="font-family: 'courier new', courier;">69961 *********** 11/60</span>
<span style="font-family: 'courier new', courier;">70062 *********** 12/60</span>
<span style="font-family: 'courier new', courier;">---------------</span>
<span style="font-family: 'courier new', courier;">- Model 260-A -</span>
<span style="font-family: 'courier new', courier;">---------------</span>
<span style="font-family: 'courier new', courier;">00101 *********** 12/60</span>
<span style="font-family: 'courier new', courier;">00601 *********** 12/60</span>
<span style="font-family: 'courier new', courier;">03600 *********** 01/61</span>
<span style="font-family: 'courier new', courier;">05401 *********** 02/61</span>
<span style="font-family: 'courier new', courier;">08684 *********** 03/61</span>
<span style="font-family: 'courier new', courier;">09632 *********** 04/61</span>
<span style="font-family: 'courier new', courier;">11958 *********** 05/61</span>
<span style="font-family: 'courier new', courier;">12977 *********** 06/61</span>
<span style="font-family: 'courier new', courier;">13455 *********** 07/61</span>
<span style="font-family: 'courier new', courier;">14784 *********** 08/61</span>
<span style="font-family: 'courier new', courier;">16272 *********** 09/61</span>
<span style="font-family: 'courier new', courier;">16419 *********** 10/61</span>
<span style="font-family: 'courier new', courier;">---------------</span>
<span style="font-family: 'courier new', courier;">- Model 260-B -</span>
<span style="font-family: 'courier new', courier;">---------------</span>
<span style="font-family: 'courier new', courier;">17101 *********** 10/61</span>
<span style="font-family: 'courier new', courier;">19530 *********** 10/61</span>
<span style="font-family: 'courier new', courier;">20930 *********** 11/61</span>
<span style="font-family: 'courier new', courier;">23333 *********** 12/61</span>
<span style="font-family: 'courier new', courier;">24041 *********** 12/61 ***** 1 carton</span>
<span style="font-family: 'courier new', courier;">25782 *********** 01/62</span>
<span style="font-family: 'courier new', courier;">27306 *********** 02/62</span>
<span style="font-family: 'courier new', courier;">28873 *********** 03/62</span>
<span style="font-family: 'courier new', courier;">31909 *********** 04/62</span>
<span style="font-family: 'courier new', courier;">34023 *********** 05/62</span>
<span style="font-family: 'courier new', courier;">35010 *********** 06/62</span>
<span style="font-family: 'courier new', courier;">35194 *********** 07/62</span>
<span style="font-family: 'courier new', courier;">36700 *********** 08/62</span>
<span style="font-family: 'courier new', courier;">38003 *********** 09/62</span>
<span style="font-family: 'courier new', courier;">40504 *********** 10/62</span>
<span style="font-family: 'courier new', courier;">41181 *********** 11/62</span>
<span style="font-family: 'courier new', courier;">43693 *********** 12/62</span>
<span style="font-family: 'courier new', courier;">45467 *********** 01/63</span>
<span style="font-family: 'courier new', courier;">47525 *********** 02/63</span>
<span style="font-family: 'courier new', courier;">48736 *********** 03/63</span>
<span style="font-family: 'courier new', courier;">50703 *********** 04/63</span>
<span style="font-family: 'courier new', courier;">53703 *********** 05/63</span>
<span style="font-family: 'courier new', courier;">54711 *********** 06/63</span>
<span style="font-family: 'courier new', courier;">55163 *********** 07/63</span>
<span style="font-family: 'courier new', courier;">55759 *********** 08/63</span>
<span style="font-family: 'courier new', courier;">56977 *********** 09/63</span>
<span style="font-family: 'courier new', courier;">59306 *********** 10/63</span>
<span style="font-family: 'courier new', courier;">60733 *********** 11/63</span>
<span style="font-family: 'courier new', courier;">63080 *********** 12/63</span>
<span style="font-family: 'courier new', courier;">65069 *********** 01/64</span>
<span style="font-family: 'courier new', courier;">67149 *********** 02/64</span>
<span style="font-family: 'courier new', courier;">70246 *********** 03/64</span>
<span style="font-family: 'courier new', courier;">73257 *********** 04/64</span>
<span style="font-family: 'courier new', courier;">75037 *********** 05/64 </span>
<span style="font-family: 'courier new', courier;">Notes: </span>
<span style="font-family: 'courier new', courier;">Entry for 05/1964 is circled and underlined. My best guess is that this serial number is the last number of the 260-B, marking the transition to the 260 E.</span>