Accosey, Chris, Buffalo, etc. His Excellency, Judge Supica hasn't chipped in on this one yet, so I will stick my neck out and give my opinion: (excellent photos, BTW!) This a NM #3 S&W, serial number 53, that wound up in some foreign country's police or military armory and acquired the lanyard swivel, either there or it was added by a distributor at the request of their foreign customer. Addition of the swivel obliterated the # 53 on the butt and the current number there was added after market. All the aspects of the gun fit the early version of the NM#3s. The "P" in the cylinder cut is a fitters/assemblers mark. Possibly the asterisk is also, but I have not seen that on other guns, The absense of number 53 on the cylinder face is because (1) a worker forgot to stamp it, (2) it's there but too worn to see, or(3) the cylinder is a replacement. Take your pick. The caliber of the cylinder chambers could influence which of the three to choose, if it's not a .44Russian. I have encountered NM#3s with unnumbered cylinders and found they were conversions to a caliber, such as .44 Webley or Eley, by using an unnumbered replacement cylinder. This gun will probably letter as an 1878 shipment to M.W.Robinson and Robinson's records will show a shipment to a foreign destination. Thousands of these guns went overseas and had all kinds of changes aftermarket by various users, so that when a collector today gets one of these "mystery" guns it can be very interestive trying to explain what is now there. Ed.