Quote:
Originally Posted by marct375
At some points in time S&W revolver parts were blued separately in batches. Depending on the materials/ prep etc. variations such as "Plum blueing" were the result.
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Not just S&W. There are Beretta semiautos that never left Europe (and never saw WD-40), with plum color slide stops and other small parts... Physics in Every Day Life... or Chemistry!