Frank, I looked in the serialization book to see if your SB was one of the last ones made or the last one made, a fast look and yours was the 2nd to last SB but it was the last SB with 30 in. barrel (????) the other one has a 32 in. barrel, you might have the last SB with 30 in. barrel parker made.
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O, and nice shooting with you, scott