Another unknown or dabated Bulova, this site has one watch listed as a Marlboro. I'll run with that til it's proven otherwise. Yellow 10krgp both case and back. Both case and movement stamped L-1, signed crown.
Got that distinct crystal.
This model name (number and Y for yellow gold) shows up in a few of our early price lists in a section which I have not figured out. On most or all of the price lists, after the "new watches" "Diamond (both men and ladies) sections, but before the "cumulative model list" there's one page with a few watches listed. No idea why, as they don't show up in the "new" sections before, and they are always in the Cumulative sections afterwords. Wonder what this one-page section of the price lists "means"
notice the price tag w/ model number in Geoff's example matches the entry from above. Maybe no ad, but I think we have crystal specs for this too...
