That just says "left hand thread"Well, it does say "SWISS MADE" on the side of the first stage. What doe's it say on the bottom, next to "+"/"-" ?
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That just says "left hand thread"Well, it does say "SWISS MADE" on the side of the first stage. What doe's it say on the bottom, next to "+"/"-" ?
Here are the only numbers that could possibly be a serial number on the first stage. 17225Left hand thread, Swiss made and from the general construction of the A clamp you can see that it's a mid 1970's design. That makes it a Beuchat.
Question now, is the exact date of manufacture and the name of it.
Can you post the serial number if you can find it? Regulators of that era often had the date of manufacture worked into the serial number.
R..