Welcome to the Forum. Photos would be very helpful here, but if it has a 6" barrel it's a K-22 Masterpiece; a 4" would be a K-22 Combat Masterpiece. It probably shipped in 1948 or '49.

To post a photo, click on Post Reply under the last message, then Manage Attachments. A smaller box will open, where you can browse your computer for the photo, then click Upload. Hope this is helpful.

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Alan
SWCA LM 2023, SWHF 220