Bulova 1949 Commodore

This style watch has been discussed earler and I leave it up to the panel to come up with an answer. The case back is stamped L0 and is stainless steel.Dial is butler finished with raised gilt numerals  and black painted hour and minute and seconds track Hands are gilt modern. Engraving on the verticles of the bezel with unusual rounded knob shaped protrusions from the top and bottom of the case. Band is Spidel and patened and matches the period.