Movement Serial No.:
Case Serial No.:
Possible 1957 Bulova 23 'O'
Case is 10KT Yellow RGP (as engraved inside) dated to 1957 - L7. It is the same style case as the G, GW, and OW. It is running on a 1956 - L6 10BPAC movement. It has the black sunburst dial with luminous hands and markers.
My reasoning for the 'O' variant designation is based on the ads provided and the 1958 pricelist. In 1955 the variants GW and OW do not exist, they were in the new model section of the 1958 pricelist. In that same 1958 pricelist the variants G and O no longer exist (appear to have been replaced by the *W). I cannot find an ad for an O variant, but based on the 1962 ads stating/showing OW as the matching black dial (w/ luminous) to the G/GW, as well as the 1958 pricelist showing OW as black...O would have been the black dial match to the G, or so my theory goes.
1955 ad for G
1962 ad for GW/OW
1962 ad for OW (courtesy of watchophilia)
Here is a current non-variant identical model, possible variant match update to this one, if assigned