21J 10BP Heat-Cold Isochronism with 5 adj, 2-Tone Dial with Raised Gold Markers, Gold Hands, L9 on both the Movement and 10K RGP Case,
Thanks Plainsman for the ID!
Takes a GS CMX352 crystal
Updated
Hi there,
That's a fairly scare model, I think? I've only seen two or three of them, to date? Do you perhaps have the crystal specs, in mm?? (L x W) If this model was available for sale prior to December, 1959, then I suspect it's probably listed in the 1960 G-S crystal catalog???
Best :-) Scott
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In reply to Here's a shot of the crystal by RGB
In reply to looks acrylic? by FifthAvenueRes…
In reply to Here's a shot of the crystal by RGB
Yes the dial is acrylic. It's a 1957 and 10K rolled gold plate (white). The lugs on mine do look like they have chamfered edges whereas your model is more squared. The dial has identical indices but different finish. I had no idea this might be a rare model. It's been sitting in my overhaul box for over a year.
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