I went and looked at it again. Serial number is S 93072 - if I remember correctly. The serial number matches throughout. It has very light rust on the top of the frame and freckling on the right side plate. There are scratches on the 5 1/2" barrel - I thought the barrel may have been changes until the I saw the serial numbers matched. The right grip has a significant gouge between the screw and medallion.

What is the difference between a commercial M1917 and a model 22?