Original vintage 1966 Bulova advertisement for the Aqua-Date diver's watch, as well as the four Accutron watch variants - "Who says a fine watch can't be exciting?  Not Hamilton!  Proof: The Aqua-Date."
 
Dimensions: 10.25 inches wide by 13.5 inches high.
 
The Hamilton Aqua-Date line's most popular model - pictured on the diver's scuba mask here - was the the "super compressor" model within the line, made from 1966 through 1962.
 
A super compressor specifically designed for scuba diving, the watch can be found with the 17 jewel 694A movement inside or the 64A, depending on the year of the watch.
 
Originally invented in the 1950s by Ervin Piquerez S.A., the term “Super Compressor” is often misused - most people associate the term with any watch that has dual crowns and an internal rotating bezel, but it’s not that simple.  Super Compressor – a trademarked name for specific case designs made by the case manufacturer Ervin Piquerez S.A. (EPSA) – it features patented case sealing method that becomes increasingly watertight the deeper the watch goes via increased pressure application to the case-back, pressing it against the O-ring gasket.
 
Per Worn & Wound, “Super Compressor divers have, for the most part, easily recognizable features that distinguish them as SC cases.  Most, but not all of the SC watches have the distinctive cross-hatching marks on the crowns, and some brands put their respective logos over the cross-hatching.  The crowns are typically oversized and thick, making it easier to operate them under water…”
 
“Another identifying mark is the use of the classic Super Compressor helmet logo.  These were almost always stamped at least on the inside of the caseback, and many brands incorporated a more detailed version of the logo on the outside of the case-back.  This is a very cool and easily recognizable feature that immediately identifies a watch as a Super Compressor…These are of course insanely rare and expensive these days…Collecting Super Compressors is a challenging but rewarding endeavor.”