UPDATE!
Would you guys believe that I've already collected 107 unique model and serial numbers! A huge thanks to everyone who has contributed so far!
If you are planning on contributing, let me know when you might be able to add to the list. The primary focus is washers/dryers, but I'll take anything at the moment, with an emphasis on anything washer/dryer related from the 50's through 1972. I'm very lean on washers from 1964-1972.
What I can share right now is that GM used a letter or letter combination to identify the appliance type within the serial number, placed at the third digit, from the very beginning up until around 1971. Here is a small sampling of what each of those letters mean:
<ul>
<li>A - Fridge</li>
<li>AA - Freezer</li>
<li>C - Range (includes ovens, flairs, cook tops, drop-in's)</li>
<li>E - Washer (1947 Unimatic through the 1964 Multimatics, 1-18's)</li>
<li>VB - Dishwasher</li>
<li>SA - Dryer</li>
<li>VD - Washer (1964 Rollermatic through 1969)</li>
</ul>
There were more codes used during this time, and as well as a new set of codes used from 1971/1972 on.
And there is more to come. Again, if you have a 1950's, 60's, or early 1970's washer and you're willing to contribute, I'd love your serial number!
Thanks again to everyone!
Ben