"Interesting" - indeed...
looking at these notes I remembered an episode from the "yeralash" - a soviet tv comedy series for children:
a little boy finds a dirty, wet and crumpled 1 rouble note on the street, brings it home, and decides to dry it by ironing, so he puts an iron on it, and the 1 rouble note becomes 3 roubles, the boy applies iron once more, and 3 roubles emerges as a 5 rouble note, then again - 5 turns into 10, 10 - into 25, 25 - into 50, the boy gets really excited... putting an iron to the 50 note makes it... - sure, it makes it 100!... - the highest denomination... then the boy decides to put an iron once more to see what would happen - and, to the boy's utter horror and dismay 100 rouble note happens to turn into 1 rouble... in desperation the boy tries ironing 1 rouble again and again but with no success, dejected he throws it out of the window, the note falls down on the road, and is 'found' by another boy... (episode "zaroyte vashi denezhki" ("bury your money"), 1990)