Mattleycrue76
Contributor
I don't know about vintage equipment so I'm not gonna comment on potential collector value. From a practical modern day standpoint I'm afraid the tanks are pretty much worth their scrap metal price.
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They are early US Divers Broxton Avenue cylinders..issued in early to mid 1950s/ Probably 70s not 72 cuft
Should possibly have "RENE" stamped on the units.
The pig tail section was very common joining unit.
Often one valve/Cylinder had a different wheel installed...When one cylinder was consumed, the diver would reach over his shoulder and turn on the other cylinder- equalize then turn off.. both units then had 1/4 of the original air. The second time the diver turned on the air it was generally time to surface and head for home..
SDM