Info on caseback looks to be acid etched, very faint. Case is a two piece waterproof where the bezel (with lugs) goes over the crystal and caseback. Movement comes out through the crystal, and has a two-piece stem.
In reply to Would be (L) 'WATERTITE' by FifthAvenueRes…
AbslomRob
There is only one distinctive lugged case for the model in mid-1950s thru early 1960s named "Clipper." is shown in the ad & example below.
There are several dial variants that also appear in this classic Clipper case. e.g.
The Bulova family of Clipper watches branches off into many mid-fifties to early sixties models with different cases, but those models are sufixed with Clipper e.g. Royal Clipper, Jet Clipper, Yankee Clipper & many more.
1959 Royal Clipper
1962 Jet Clipper
In 1962 Bulova adverised 4 different versions of the Jet Clipper.