It says 10k gold filled. I am not sure the year or model.
In reply to Thank you everyone! Yeah by tlove068
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Not hard at all. All you need is the measurement between the lugs for proper fit. Check online auctions if you want one (leather or metal) that looks proper period on the watch. Take note that the metal bands currently made probably won't color match because they aren't gold plated. Personally, I would wear it and enjoy it as it is. It's a 40's watch on a 40's period band and as Poppop wore it.
There were a couple of President variants using this style Y-GF case and dial; 'A' had the leather strap option, and 'D' had an expansion band, 1948 example. Since we don't know which type of band this watch came with originally, perhaps we designate the 'A' variant. From what I can tell, the current band looks to be a later type, similar to a late 50s Craftsman band.