That basic back pack configuration has an interesting genealogy.
The first one I ever saw was back in the straps and band days. The late great Charlie Sturgil's home was the center of diving in So Cal. Charlie began his diving career in 1929 by "feeing for Abalone". In the early 1940s he saw a Japanese dive mask, which didn't fit his face or any western face, so being a master tool and die maker he made his own dive mask which he graciously made for a few special friends (see
www.portagequarry.com Legends of diving "The mask")
Charlie's garage was the meeting place for all divers. Charlie could and would make about any thing for you for a few dollars. Some of my most prized dive possessions are the points and game bags and spear gun he made for me.
I was picking up something from Charlie, probably a point or two. Charlie was busy in his garage bending and shaping a piece of SS. "What the heck are you making now?" I curiously asked. "Gary and Rocky wants to get rid of all the straps and bands so I am making them a device that will hold their tanks and they can change tanks easy on their boat."
This "Device" was very similar to the one Dick Anderson "designed" and Healthways marketed. The over center quick release was also one of Charlie's designs and products. It came from the WW 11 USN life preserver quick release which was marketed in SoCal by Garry Huth a war surplus dive shop owner. Charlie duplicated them in heavy duty SS rods for both 1 and 2 inch webbing. I still have a few after all these good years.
Gary and Rocky came back for mod 1 mark 1 on the device, This time Charlie bent the edges and installed straps with his quick releases. This design was immediately copied and marketed by Sportsways (established by Healthways) as part number 1203 Tank-Pack- Look it up!
Please bear in mind that Healthyways had a somewhat less than a golden reputation with the SoCal tribe. Very few reputable SoCal shops would carry their equipment for a number of reasons, which is why there is so much Heathway's equipment in the hinter lands of the US and very little in SoCal.
Gary & Rocky? Perhaps you have heard of them, Mr.& Mrs. Gary Cooper, the Hollywood movie star. To the tribe they were Gary and Rocky, just two other lousy SoCal divers who were members of the tribe.
I fear I have rambled --but now you know at least part of the rest of the story
SDM