 1957-1960 Scuba. The first year of production featured blue hoses to distinguish them from any other regulator on the market at that time. Healthways also used Hope-Paige mouthpieces on this first model. Note the all metal, riveted label. |
 1960-1962 Scuba DeLuxe. This model featured a new case design and a new mushroom exhaust valve, but was otherwise identical internally to the older model 'Scuba'. The Hope-Paige mouthpiece was dropped in favor of their own rubber mouthpiece with check valves. |
 1963-1966 Scuba. This model featured the new internal yoke screw, and a "balanced Venturi system" that directed a blast of air down the intake hose for easier breathing at any depth. There was also an "air deflector in the mouthpiece to prevent involuntary loss of air". |
 1965 Scuba Master. This two stage regulator featured a piston first stage, to deliver more air with no increase in effort. It was featured in the 1965 Healthways catalog, but unfortunately it was never even manufactured. I don't know of anyone who has ever actually seen one. |