The "wings" of the chicken on the backstrap (or is it the frontstrap?) are not symmetrical...but it is surprising to me that the lines are so well defined, cartouche and letters/numbers...this is a curved surface; stamps would not work, they must all be engraved, probably by mallet & chisel...maybe by a Dremel-like tool...It is art of its kind, but probably not something anyone other than a police agency would want to collect...
Edit: On the magazine markings...I am no expert of any kind, but these are the first mag marks I've seen that are so nicely spaced; so evenly stamped as to depth; so level and perfect...Most I've looked at are rather sloppily done...Like the maker (or marker) didn't want to expend time & effort on something that would likely be thrown away if used...an expendable commodity, not a treasure to be cherished...The two bottoms just look too perfect...but they sure look nice!...
...Just my thoughts...
