Welcome to the Forum. What kind of information do you need? That serial number and caliber say you have a K-22 Hand Ejector, 1st Model or also known as a K-22 Outdoorsman's target revolver. Made from 1930 to 1940 in the standard K frame M&P serial number range from 639, 132 to 682,419. 19,500 were made. Your revolver would have shipped around 1937.

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Gary
SWCA 2515