I could be wrong, but a while back I read somewhere that the Russians were using the Theodosia
mint and the supplies they found there to strike the initial silver coins. I believe they also ran into problem procuring coal fro the mint.
I also do not believe that the Tatars used the 16 rouble's to a pud standard. There was an thread on Staraya Moneta that went into some detail about that.
In fact, for the Kyrmis coins there were 2 standards. There are Kyrmis coins with the ornate edge (leafs, sort of like Polish coins), they weigh something like 45 grams. Like this one that I have weighs 43.5:
And then there are heavier rope edged coins, they weigh in at abut 60 grams. Like this one that I recently got, weighs 60.5 grams:
I need to find that article, but as I recall the rope edge coins were the newer standard, and were distinguished from the old coins by the edge design.