I am the previous owner of this watch. Case and Movement marked L0. I believe it is a Belmont. I have an ad photo but I'm not sure if I own the copyright so I'll let the membership see what it can find.
I would say this is 1950 Helmont

Agreed, good ad find. Love those lugs.
1950 Helmont
Didn't we think this was a typo and it's actually the Belmont?
In reply to Didn't we think this was a by plainsmen
I think that discussion probably pre-dates me. Two other watches like this in DB ID'ed as Belmont - nothing under Helmont (listed as a model in the drop down list). I'll leave this one to the panel at large.
In reply to Didn't we think this was a by plainsmen
it seems that this is probably a typo, but who knows
Belmont
It's a Belmont.
1950 Bulova Belmont
I revise to 1950 Belmont as well.