10,000 pistols were shipped to the Royal Air Force from this serial number range and were.
45 ACP and serial numbers that begin with a “W” were. Theoretically, the approval number should allow dating these to within a five year period corresponding with the date of USCG approval under section section 160.040 covering life saving appliances. LINE THROWING GUN- KILGORE MODEL GR-52 - Serial number 617 with USCG approval 160/040/4/0 as marked on the frame.
