Some more assumptions....
Using the chips from the colllection & checking the surrounding areas around St Petersburg, (I'm using Google Maps btw, my Geography is crap

). there were chips from Estonia & Latvia, both which are in close proximity (on a computer screen at least)to St Petersburg. Question is do they use $$$ currency chips like cruise ships change their currency chips over?
Also, does that mean that from my original post the 2 sets of Admiral Casinos may not be related at all! Could it be the second lot featuring la Rosa Nautica are Peruvian? {cries in anguish}