Hi Mike,
What you are describing is a common feature of many UG dials from very late 30’s and very early 40’s.
Here just a few examples from my collection to illustrate the matter. I have no doubt about their originality (except some minor flaws like lume…).
Best,
Martin
Ref. 22408 and 7340 ( I also have another 22408 and a 7339 with similar dials, subdials look the same):
View attachment 1258290
Ref. 22213 and 22207:
View attachment 1258284
Ref. 5955:
View attachment 1258283
Compaxes ref. 22272 and 22266:
View attachment 1258264
And combination of railroad track and simple ring outline on a Contax (photo from my watchmaker where the watch is now):
View attachment 1258263
Click to expand...