Gentlemen,
"the first theory", mine, is totally wrong! I made a mistake :-( I simply oversaw, that Gantsev already passed away in 1968 and not in the 1990s, during the inferno of the Yeltsin-era. Of course, in the 1960s Gantsev would have got a duplicate OGI with stamped s/n. and with an "d" on it!
"The second theory" by Slava1stclass is the correct one :-)
I guess, Matt's OGI will get a highest bid somewhere in the range between USD 5,000.- and USD 7,000.-.
The order is in an outright 10/10 condition, represents the very last version and there are no doubts about authenticy. On the other side, this OGI has no history, due to fact, that this order came directly - stolen or illegally sold - from the mint and the s/n. was afterwards faked, to hide the legal ownership of the Moscow mint. So, it seems quite difficult, to sell it to a Russian collector.
Kind regards
Christian