The OP's gun, shown in the first post, is a product code 150674. Guns with a CMV s/n prefix were made in August of 2009.
A scandium frame gun will have a small "blast shield" in the underside of the top strap, above where the barrel comes thru the frame. J-frames made from plain aluminum alloy won't have one.
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~ S&W aficionado in training ~
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