I do not know much about these clocks but my Dad carried one similar to it (darker dial color) through WW II in Patton's Third Army...Battle of the Bulge etc.
If I can find it, I'll post a pic of it.
The Memovox movements in the clocks were in reality wristwatch movements. I had a couple yellow gold filled Memovox watches but sold them 20+ years ago. A friend bought one for $150 about the same time assuming it was yellow gold filled but it turned out to have an 18K case. It came with a steel case back so the alarm would make more noise.
I have had this one for many years, an 8 day LeC alarm clock. Had it c/o and a new balance staff in the late 1990s and it still runs fine.
Edited 10-29-22...My Dad's Jaeger LeCoultre alarm clock from WW II...
Layout of the back...
The movement is slightly different.
I wound it a couple turns and it still runs almost eighty years after WW II with no service.
As an officer, the clock was issued to him along with his ACP .45 etc.
It was originally painted 'OD' (olive drab) to lower reflections and the dial has radium lume.
I still have it all along with 8 or 10 German swords, a box of medals etc. he brought back in a 32" long X 22" high X 22" wide steel footlocker.
Included was a complete set of works, weights, pendulum etc. for a tall case German 'Grandfather' clock that was stored in our attic for 40+ years until one of our relatives made a walnut case for it.
I have cleaned/oiled the clock two or three times and it still runs and keeps time within a few seconds per day.
One of Dad's caps:
A WW2 German Luftwaffe 2nd Pattern Officers Dress Dagger from the swords etc. he brought back:
Also have the original scabbard with blue velvet backed brocade hanging straps that go with it.