Hmm...something is not right here, I'm afraid.
The movement appears to be a calibre 73, but all calibre 73s had subsidiary seconds. Also, this calibre was only used in pocket watches.
The numbering on the case is way off; at most it shouldn't be more that few hundred thousand more than the movement number. I'd estimate that your case number is more than 80 years too late for the movement.
All this leads me to conclude that your watch, unfortunately, is a "marriage" --it never left the factory that way, and instead has been cobbled together with real parts. Here, the quality is such and the differences so fine that it really appears to be an excellent forgery, using a real movement stripped of its seconds indication.
Sorry!