These US DIVERS triple tanks are not any different from the other set the Scuba Museum has, except for the history.  These tanks where procured from the legendary Hal Watts.  These tanks had been deeper by the 1970s than most modern tech divers would even think about going today.  These tanks are prized by the Scuba Museum as one of it's most exciting displays.

Photo gallery of the visit with Hal Watts.  Action pics of the Hal Watts triples.