Welcome to the forum.
VM is right.
Model numbers weren't assigned by S&W until 1957. There's an additional side plate screw that you can't see (without removing the right stock) and the screw in front of the trigger guard is also counted as a frame screw. FYI, the strain screw on the front of the grip frame is not counted as a frame screw.
It has no value - send it to me!
Condition? They made a lot of M&P's and they're great guns. Without seeing it, I'd say it's worth between $125 (Bubba refinish) and $500 (NIB).
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