Dave,
If the mag is matching, the S# is 2490r. The 'r' suffix is part of the S#. You will find it under the S# on the front of the frame.
The remaining parts not shown in your pics which should have matching numbers are; frame (S# w/suffix), barrel (S# w/o suffix).
Parts with last two digits; hold open, firing pin, thumb safety, safety bar, rear toggle, grips, and breech block.
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Mike C.
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