More pictures of the 4" navy # 10.
In the first two pictures, one can see where the small pin was added to support the P 08 type safety arm when the conversion from the grip safety was made. The small circle where the pin was added can be seen faintly if you look hard for it!
You can see the original 747 centered over the a, with the over stamp of 4150 on the barrel, and the original 7 47 on the receiver bottom and lug as originally marked on the 1906 upper.
The Erfurt rear toggle with crown/B of a spare part, with the number 10 for this frame added.
I have no explanation why the barrel was not over stamped,again, with a "10"; or why perhaps the frame was not numbered as "4150" to match the over stamped barrel.
Another one I wish could tell its own "story".