What eye opening information. I have been scouring old auction records and together with the Post-Rider article have seen how many C68's have been sold as the wrong position by reputable auction firms.
Another striking thing that comes out of the Post-Rider article is that there were likely many more C68's produced by the Soviet Philatelic Bureau than were officially acknowledged. A great many more. The come to auction and online in abundance and although Scott maintains a cv in excess of $1,000 for a MNH example they frequently trade at far less for a fresh well centered example.
The article talks about another issue, Scott Russia C12b-13b, of which 1,000 sets were supposed have been produced in one printing. Mikulski stated to the author that he alone had expertized 1,500 different pairs and had distinguished at least five different printings in the process.
Great stuff and I am so grateful for the article. So much to digest.
Note: During my auction records review it was amazing to see the prices being fetched in the years 2007-8 before things fell apart. A MNH C68 was going on average for $2,500 w/o tip. $500 now.