I purchased a UG from a gentleman who bought straight from Henri Stern in New York before going off to WW2. He shared with me his experience, very neat. To the point, they could order you the dial of your choice for your ref. watch but you had to of course wait for it to come in and there was no telling during the war when that might happen. But each watch had a choice of dials, usually specific to a task, just like many other manufacturers of the day.
Wayne
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