I just traded into a pretty nice Military & Police model in the C269xxx serial # range, blued with 4" barrel. It is all matching except the grips and has the "P" proofmark on the barel, cylinder & frame, and is also stamped "U.S. Property" on the backstrap. It also has a lanyard on the butt. I'm curious as to where and to whom these might have been issued. Any thoughts/comments are welcome as this is the first one of these that I have seen.
Lee is right--it is what the Marine Corps called the Victory Officer's Model. About 4,100 of them shipped to Camp LeJeune and the Marine Supply Base at Yermo, just east of Barstow, CA. I would like to add the complete serial number to the database if you don't mind sending it to me in a PM.