I picked this up last week.

MR = Mount Rainier Arsenal. A unique and interesting find.

This is the only one I've seen with double stamps. Ithaca frame and slide but the Ps are different, which is ok for what it is.

I brought this back to the top since it's an example of a Arsenal Rework with the proper stamps for Mt Rainer Depot. This one wasn't refinished, however the slide and the frame are from two different Ithaca pistols.

In addition to being a Mt. Ranier, the Ordnance Stamp appears to be complete, that in itself is rare. Seems most are partially struck and barely visable. Nice find!