Some of you know of my interest in the Illinois size 12 extra thin Model 3 525/527 watches.
The latest addition to my collection has arrived today. After waiting out a very long 7 day auction on Ebay,
I managed to get it for $35.65. I’ll leave you to judge if I got a bargain.
The movement, front bezel and the back of the case are made of aluminium (plain back), the band, bow and crown look to be white gold filled; the watch weights 27kgs and a Marquis 525 from the second run is 48kgs.
Only 50 of the aluminium watches were made 3,869,251 to 3869300 in 1921 this one’s 3869282 and running well.

Movement, sorry about the size i'll have to work on that

Inside case.

Jim,

Outstanding find... I thought I had gotten a deal when I found a Waterbury aluminum for $32.00