I like some of the older models you guys are showing, keep it up!
Me, like I have mentioned, I like the 60 Hour models that are from 1924-1932. This is the end of the Illinois Era, the transition from the sale to Hamilton began in 1928. This was (IMO) the pinnacle of watchmaking in the US before pressed jewels and Swiss movements became the norm.
So let’s talk 60 hour movements.
60 Hour moments came in 3 different jewel configurations, 19j, 21j and 23j all of which were Railroad Approved.
Additionally each jewel type also had variants with in the line. Identified variants are known as Type I, Type II and Type III movements. For both 21 and 23 jeweled movements there are also sub variants of Type IIIa and Type IIIb. Commonly seen as TI, TII, TIII in listings. The differences between these I will show below in 23j versions, same points for 21 and 19j models just different jewel numbers.
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