My recollection is that a player had to earn so many credits on their player card in order to be eligible to blindly reach into a container and select an envelope in which random chips were inserted for that particlar week. As weeks went on, more chips became available, the larger the selection. There were also bonus chips that would permit additional picks. These bonus chips are very hard to find and are not normallya part of the date set. There was also "wild" chips where a player could substitute for a missing chip.
Players who completed their sets were eligible to enter them for prizes at a special event that was held at the end of the promotion.
I don't n
know of anyone who has a complete set including all of the various bonus chips.