three digit gas trap on Julia Auction

[Calif-Steve]

They had a Gas Trap at Benicia Army Depot had hung in the Small Arms Branch. It was there for years. When they shut down the Depot it disappeared. I know a local Bay Area collector has/had it and it was a real, true Gas Trap. It has not been seen here in years. I wonder where it went.

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[Bob Seijas]

I'm guessing that was the very late one that showed up with Bill Ziegler at San Francisco Gun Exchange. It solved the mystery of the late -1 gas trap cylinder. Before that we were all convinced that parts numbering was completely regular, with dashes first, then no dash and a space, then no space, then no number. The -1 cylinder was a puzzle because there didn't seem to be room for it between numbered cylinders in the low 20,000 range and no numbers in the 23,000 range unless only a very few were produced. Then this one turned up with a -1 cylinder and it hit me like a ton of bricks: the -1 was later and came after the others! I remember writing a breathless letter to the other collectors that the mystery was solved!