Nick,
You're welcome to use whatever information from my "Color-Pak" list to complete your 1400-Series list. I know it is less than 100%, so feel free to synthesize your information to correspond with your research.
I still think the best way to get the most accurate data is to visit the McLean Museum of History's library in Bloomington, Illinois, where the Eureka-Williams archives are collected.
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I now wonder, too, if the 200-Series information is inaccurate. Might it go something like this ... ?
260-A square handle, cream hood
260-B square handle, chrome hood
260-C square handle, cream hood (Canadian version of Type A)
260-D square handle, chrome hood (Canadian version of Type B)
260-E round handle, cream hood
260-EK round handle, chrome hood
(no 260-DK)