I think I'm two for two on unknown watches. To me this looks like a complete match to an unknown watch entered into this site on 4 February 2018 by neatstuf-4-u.
Yes,Indeed. It's a match to the one I entered in 2018 and unfortunately it's still an unknown.
In reply to I guess here is a certain… by Colonel Fury
In reply to Certainly a case, dial and… by mybulova_admin
We currently have a single example ID'd as His Excellency "B" dated 1951 in the database. That one has ad shown "X" shadow dial, 21J movement, as well as a fine band of engraving around the crystal that is apparent in the ad if you really look for it.
Subject watch, as well as the other example I uploaded are something else. It's anybody's guess if they are HE variants.