Bulova 1951 -Non-Conforming
This is the sister of the Seabee (And the Magellan), the Watertite. This one seems to date from 1951, althought the case has no date or serial number either inside or on the back. The movt is stamped L1, and the crystal is the smaller type associated with the Watertites at around 25mm.
Simple case, only a bezel and case back, both in Stainless Steel.