Junghans J47 b/1 pocket watch set of two with black dial - one works fine

Description

thank you for looking at my listing,
Junghans J47 b/1 pocket watch set of two with black dial - one works fine, the other needs help(likely just a service) and an extra case.
Both are complete and unmolested. Also come with protective outer (travel?)cases one round and one pear shaped
It is time to thin out my collection and these two beauties will make a fine addition to your collection.
Estimated manufactured date is late 1930s
The crystals are clear and seem to be of a plastic material. The cases are unremarkable, black, and unfinished.
there are no identifiable markings on the cases.
Being of the J47 variety, I wouldn't say that they are rare, but since they are both black dials with luminous markings, they certainly are uncommon especially in such good condition.
SERIOUS INQUIRIES ONLY please
classified as a Quality Watch
open face calibre
47b: 15 jewels, flat hairspring
suffix /1: separate escape-wheel cock
/1 indicates the separate escapement bridge which was likely introduced in 1938
these sell and ship to CONTINENTAL USA ONLY - NO INTERNATIONAL SALES