I've got a few LE-marked handguns. My favorite is a S&W M-10 4" that is marked on the backstrap with "Royal Hong Kong Police".
Most agencies don't mark them. My current duty gun has my agency initials as the first 3 "digits" of the serial number.
Most agencies don't mark them. My current duty gun has my agency initials as the first 3 "digits" of the serial number.