Hello Gallorosso,
It is relatively easy to see it but I never seen graphical proof like this one before.
Would you like to help us with the article? Do you have some Khorezm stamps?
Our census now has 15 (+9-sheet +4-block = 28 in total) of 500r and 4 (+9-block = 13 in total) of 5000r.
I would be very grateful for everyone who can help, the article will be free online in slovak/english/russian language.
Best regards,
Marko