Usually most would define a "1917 Commercial" as a prewar, long action gun and the model 22 (post 1957 production) would have been a short action.
A few 1917 Army revolvers were made after WW II and before 1950, about 1000 or so, some with the new style hammer block and an S prefix to the SN (210000 number range) and some without. These would be pretty much the same mechanically as a prewar Commercial.
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Alan
SWCA LM 2023, SWHF 220
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