Looking at my pre-27 ser# S-129595 [I think 1954] The bluing looks like a new gun. I think maybe a factory refinish, but the only stampings on the gun is a B on the left grip frame and on the inside of the ejector rod shroud...How does the factory stamp guns that have been sent in for a factory refinish and do they ever change the way they stamp them over the years....Thanks in advance...…………………………………….M*
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