Yes...any K-22 without a letter prefix before the SN would be pre-WW II. The K prefix guns started after WW II to 1970; a number before and after the K to 1983; and then the three-letter prefix with the number after this to the present.

If you find one, you can post the prefix letter(s) and a partial number, like K 123xxx, and someone can tell you the ship year and how it should be configured. Hope this is helpful.

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Alan
SWCA LM 2023, SWHF 220