First of all, the rifle appears in very nice condition. Com-bloc Milsurp
collectors will like the lower serial #, even though it's hard to produce
solid evidence of a heightened value. It will be a great
conversation starter at the range, campfire, or
for your shooting friends.
Another issue is iron-curtain weapons manufacturing has been
shrouded in secrecy for decades.
It's not like checking the serial # on a S&W 29.
I have a Russian rifle from 1925 with matching serial#s "1590",
which might actually mean something, if there were
any documentation paradigms to use as a reference...