This is not a military-issue Ebel, which would have a caliber 99 and would also have the appropriate markings on the back. But given the materials and styling, I'm thinking it was made during those years.
The reference number provides information:
The first digit (2) means the case is plated, though it has a stainless steel back. Digits 2-4 define the movement, which is a caliber 120. In the last few decades, Ebel has assigned that caliber number to an ETA 2892A2, but back in the day, the cal. 120 was an AS 1203. The production period of that movement might validate the age, but I don't know when it started. It certainly was made into the 50's, but I just don't think this watch is that late. Ebel was an early adopter of shock protection, though always ready to try an alternative to Incabloc. This one is not shock-protected, and that suggests the earlier production.
The past three digits identified family, size, and finish in later years, but I'm not sure if that was the case always, and the codes meant different things in different periods. If applicable here, the"082" would denote a special production model of large gents size, with a standard finish (probably polished without jewels). That isn't implausible.
This movement is marked "120" and "Ebel Fabrique Suisse", according to their usual marking scheme.
It has no markings suggesting it was imported to the U.K. or to the USA, and I bought it from a seller in Poland. Clearly, this is a European-market watch, and I'm sorta curious how it found its way to Poland.
The case has been restored--polished and replated. The job wasn't perfect but I buy this stuff to enjoy and occasionally wear, not to be absolutely original, and this watch looks very good. The dial is original, though I'm not so sure about the lume on the minutes hand, which I think is newer than the rest, and not as well applied. The dial itself is really gorgeous, with finely outlined numerals filled with (the remains of) radium lume.
One thing that puts me off military-issue watches (besides the price for good ones) is their small size. But this one is a little bigger than military Ebels, at a little over 34mm in diameter and 42mm lug to lug. Thickness is about 9mm.
Its running consistently fast at +90, but I haven't yet really looked at the movement to assess health.
This watch would have been made in their new factory in the Rue de la Paix in La Chaux-de-Fonds, which opened in 1941. They used that facility until 2013.
I now have an Ebel from every decade over the last 70 years except for the 70's. The collection marches on!
Rick "more Ebel fun" Denney