Tom IS quite correct about the Inglis, the SN was pantographed...at all 3 positions simultaneously, after the frame/slide were phosphate finished, so it presents as white. 6T9133 was manufactured late August '45.
476 is not a SN, it's an FN "Contract Number" and useless for dating the pistol...unless we knew exactly which of many contracts during that time period it was meant to fulfill. It was manufactured no earlier than '52 but perhaps as late as the mid/late '50s. There's an indistinct small partial square with a number inside at the trigger guard root starboard side, a very close up inspection of that...and any other small partial squares with numbers inside will narrow down the manufacture date. These FN Part Date Codes may be found on Frame, FP Tunnel, Trigger, Hammer, Safety, SS and/or FP Retaining Plate. Though it might be the pic/lighting, it does appear very professionally refinished, the original finish during that time period was still the original polished rust blue. And...unfortunately, the magazines appear to be aftermarket KRD...considered by many to be junk. Some say they've had some luck with them.
The Argentine '61 obviously was refinished, the purple paper shown...as Tom says, with 476 belongs with the '61, The box is NOT an FN box, it was made up after the pistols were surplused.
Hope that helps
.....