Wow ! That is just beautiful. This seems a rare bird indeed. Case, dial, bumper movement all look great. I’d guess $1500 - 2k? Will let the three hand experts weigh in.
Don't think I've ever seen one of these. It vaguely seems in the same ballpark as this example, which is from a similar time period (158XXXX).
I think it is very hard to value, as there are no market comps, so it becomes whatever someone is willing to pay. I think it depends a lot on who sells it and how.
very interesting, i only saw this kind of movement, but never saw this kind if dial. the engraving on case back means its a gift from a company/organization.