I’ll put my 1921 built K38 M&P that got a trip back to the mothership in ‘57 for refinish up against anything K with a model number…
And I'd 90% agree with you .
Not to nit pick, but the specific " K-38 " ( and the K-22 , and K-32 family) Model Name was introduced in 1947 .
Pre War , the M&P were available with Target Sights as option , so that's plausible also .
Yes, the old Long Actions are better triggers (but slower lock time ) than the subsequent Short Action , and I prefer them . But parts for them have dried up from the major independent parts sellers , so you would possibly be searching for parts donor guns , if you needed parts
The only other potential thing to look out for , is 1921 is non heat treated cylinders. You'll be fine with standard pressure loads , but be sparing with +P .
I'd have to double check SCSW , but iirc , my M&P .32-20 outdated that by a few years .
A few years younger , but my first duty gun was a 1942 Victory ( Not Government issued , probably a DSC gun .)
Have you confirmed or documented your Born On ? If you post or PM your s/n with last couple numbers X'ed out , l can get back with your year of production in a cpl days
Meanwhile- S&W officially approves all K Frame with Model number stamped ,.for use with +P .