M38 or 91/59?

I have a nice short Mosin Nagant that has no-import markings on it and a very clear B stamped on the M-44 style stock. I just noticed there is a different grind on the rear of the receiver than my other M-38's have, in fact it is the only M/N style rifle I have with this flat grind on it (Hum, 1 in 30 odd's). It has the Izzy marking on the top were it should be with a very small #2 next to it, 1943 dated, Serial #BB 7905. With that being said, I've recently handled a 91/59 at a local gunshow. Being completely honest, I was hard pressed to see the difference between the 38 and the 59 other than a little extra nomenclature on the barrel base. Do any of you fine fellows know exactly what I should be looking for? Also why does my 38 have that strange flat grind on the receiver? Is it possibly a 59??? Many thanks for your time-SDH :sos:

Normally, the 91/59 will be devoid of all markings and USUALLY you will find the serial number begins with the letter B as in BB, BC, . Apparently there was only 35,000 made, so as the MN goes, they are a scarce item. Most are a forced match, with the majority of numbers having been removed and stamped, not electo-penciled to match. Bulgaria was always an enigma when it came to arms, so the true story might never be know, but this is what is know of the 91/59.... Another clue on the 91/59 is the rear sight. It has the numbers milled out from 700 metres on.....

Is there any truth to the roomer that these guns may be the product of an importers desire to create a nitch rifle?-SDH

No, no truth to that. The US Army has records of M91/59's being turned in by East German border guards that defected from the Berlin Wall. They were a real variant made from cut-down M91/30's in the post-war era.

Many Thanks, thats what I was looking for, the next step is to figure out which one I'll be adding to the locker MT-SDH