Tickets for the Olympic stadium were printed in 5 colours to designate the stand to which the ticket applied, as follows:
Green - Stand A
Yellow - Stand B
Blue - Stand C & D
Red - Stand E & G
Grey - Stand F
You will note that the price of the ticket in the bottom left hand corner differs between the Swedish Krona and American Dollars. The tickets marketed to residents of Sweden were naturally priced in Krona. Tickets sold to foreign spectators can be identified by the charge being in dollars.
The tickets were printed by The Bank of Finland, upon banknote paper and contained a 'rose' tinted watermark to deter counterfeiting.