Great looking pipe.My last Pete, it's marked Peterson's "DUBLIN" XL02. Both the rim and band are also stamped PETERSON DUBLIN and the there are three hallmarks in a row, the first seems to be Hibernia, the second is a large 925 and the third is a smaller 925 in the middle of a scale. No letter to give a clue to date but I've read Peterson hallmarking was sketchy 1938-1969 and I feel this is from the 1950's-60's.
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The .925 stamp started in 2003 if Im not mistaken.