I have a vintage 1970's Farallon SPG (in psi) that I originally started diving with... while it still seems to work perfectly the o-rings are old now and I'd like to restore it as part of a classic DH set up.
It uses an early integral form of SPG spigot, but takes the usual o-ring... no problems there.
However the flanged connector uses two o-rings one in compression at the end, and the other around the shaft of the connector.
Anyone familiar with these old gauges and know what size o-rings to get?
Not sure whether these were just rebranded gauges made in Italy or they really were made in USA... and so Metric or Imperial o-ring sizes.
Also the HP hose is 3/8" UNF vs modern HP hoses which are 7/16" UNF.
I could just use an adaptor but I'd like to keep it looking original... however cannot find a source of HP 3/8" UNF hoses or HP 90 Duro o-rings to suit, most are 70 Duro.
Any advice gratefully received