It often involves everything from serial number, the actual guns build features & engineering changes, the individual inspectorвЂ™s marks, the coded part inspection dates. Thank you very much!Дating older Hi Powers is a very hard process that yields more of a SWAG more than an exact date. Also a number on the hammer which these old eyes can't make out. Whoopee! There is indeed a '1' inside a box on the rear of the slide. Thanks again for that info! I took a couple of crappy cell phone pics that are shown below. I still wish that I could nail down a year of manufacture,but that looks doubtful. Other than a Nazi-proofed model,it is my earliest. Nevertheless,I'm happy to add it to my others. When I bought it,I was thinking that I had found a treasure,but it appears to be just another trinket. When checking values,it looks like the post-occupation manufactured guns without an 'A' pre-fix were the most commonly found guns and unfortunately,the least valuable. The markings appear to be identical as well,although it's hard to tell from MY pics. My gun is pretty much the same as yours (with the exception of the original mags and holster). The info in your link seems to confirm what my limited research has found. Definitely post-war for both yours and mine.

Here is an earlier post on FN Hi-Power s/n 56540. market (at approx s/n 70,000) under the Browning name. Based on my limited knowledge, I understand 1954 was when the Hi-Powers were first introduced into the U.S.

Browning serial numbers hi power