Harrison,
Here’s a list I obtained from the Hesco Inc. website
http://www.hescoinc.com/schematics_eureka and some others I added. I have no idea how complete it is for the 1950s-1990s range (I didn't copy everything), but at least you can use it as a guide to help you find models you’d like to have.
The list doesn’t include rebadges with private retailer names like Eaton's "Viking," The Bay's "Baycrest" and "Beaumark", JCPenney, Montgomery Ward, Firestone and Western Auto.
Also, this thread, #90 from 2006, includes good information and quite a few photos:
http://www.vacuumland.org/cgi-bin/TD/TD-VIEWTHREAD.cgi?90
Canisters
450A
500 & 700 Series (Prince/Princess)
500, 502, 508, 513, 550, 555, 560, 702, 703, 705, 711, 713, 714, 730, 736, 737, 738, 739, 740,741, 743, 745, 755, 760, 761, 765, 770, 773, 780
800 Series (Roto-Matic)
900 Series (Roto-Matic)
960 (Gold Crown, 50th Jubilee), 965a
1100 Series (Empress)
1200 Series (Roto-Matic Power Team) 1973-
1243, 1244, 1245, 1246, 1248, 1249, 1254, 1255, 1259, 1271
1600 Series
1620, 1625, 1630, 1640, 1650, 1660, 1663, 1680
1700 Series (Power Team)
1730, 1731, 1740, 1743, 1745, 1746, 1750, 1756, 1757, 1758, 1760, 1761, 1763, 1770, 1773, 1777, 1778, 1783, 1784, 1788, 1764, 1774, 1790, 1791
1800 Series (Empress II)
1810, 1820, 1830, 1833, 1840, 1860, 1880
POWER NOZZLES (Old Style)
Ironsides
1739, 1789, 1799
Rally
3837, 3850, 3860, 3865, 3916, 3930, 3974, 3975, 3977, 3987, 3988
Uprights
200 Series
210 (Easy Glide), 260 (50th Jubilee model), 265, 270 (Vanguard)
600 Series
625, 625D, 626
900 Series (Heavy-Duty)
918
1400 Series (Princess)
1401, 1402, 1403, 1404, 1405, 1406, 1407, 1408, 1409, 1410, 1411, 1412, 1413, 1414, 1415, 1416, 1417, 1418, 1419, 1420, 1421, 1422, 1423, 1424, 1425, 1426, 1427, 1428, 1429, 1431, 1432, 1435, 1436, 1437, 1438, 1439,1440, 1441, 1442, 1443, 1444, 1446, 1447, 1448, 1450, 1452, 1453, 1454,1455, 1456, 1457, 1458, 1458A, 1459, 1462, 1463, 1466, 1469, 1470, 1471, 1473,1485, 1486, 1489, 1490, 1495
1500 Series (Emperor)--Panasonic rebadge
1900 Series
1903, 1923, 1925, 1928, 1931, 1932, 1934, 1935, 1941, 1942, 1943, 1945,1946, 1947, 1967, 1968
1934AGS
2000 Series
2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019,2020, 2021, 2022, 2023, 2024, 2025, 2026, 2027, 2028, 2030, 2033, 2035,2036, 2042, 2042D, 2043, 2044, 2045, 2047, 2048, 2049, 2050, 2052, 2053, 2055,2058, 2060, 2061, 2062, 2064, 2068, 2070, 2071, 2072, 2073, 2074, 2076, 2077, 2079, 2080, 2080B, 2081, 2082, 2083, 2084, 2085, 2086, 2087, 2088, 2090,2091, 2092, 2093, 2095, 2097
2300 Series (Dial-A-Nap & Rugulator)
2315 (Sport), 2325 (Casual), 2375 (Everyday), 2385 (Chic) Wild Moss bag pattern, moss green color
3200 / 3300 / 3400 / 3500 / 3700 Series
3210, 3220, 3240, 3360, 3320, 3325, 3330,3331, 3335, 3440, 3450, 3460, 3470, 3560, 3710, 3711, 3715, 3720, 3721, 3760
3690AV
3712
5000 Series (Self-Propelled)
5040, 5047, 5060, 5070, 5071, 5077, 5085
5134, 5150, 5175
C Series
C2031, C2032, C2035, C2037, C2045, C2055, C2057, C2063, C2065, C2066, C2094, C2125, C2132A, C2194, C2720, C2740, C2770, C4046
S Series (Sanitaire- Domestic “Blue Line”)
S634
S639, S644, S645, S648, S650, S652, S654, S655, S657, S658, S659, S660, S661, S662, S663
S647A
S670A-1
S677A-1
S678
S782, SC785AT
S785AT-1
SC Series (Sanitaire--Commercial “Red Line”)
SC675, SC679, SC681, SC684, SC688, SC699, SC886, SC887, SC888, SC899
SC689A
SC881A
SC882A, SC883A
SC785AT-1
SC5815A
SC5845A
SC6600, SC6600A (ProTeam)
SC9150, SC9150A, SC9150B, SC9180