I found this one on ebay recently. After looking through the pictured models and ads I believe its a 1953 Thayer. I don't think anyone actually had a pic of one of these. I know there is a 50 duo wind and a 52.
It occasionally will run,even when wound, so I'm sure it will need a repair in addition to a good cleaning.
I'm also not sure how to get the back off so no pics of the works at this time.