Question about a set
 

I just picked up a set of round disc cards.They are 3.25 inches in diameter.
On the back it says A Collectors and Traders Item available at ISALY'S
155 locations to serve you and SWEET WILLIAMS family Restaurants.
I was wondering how many are in the set(I have 70) and also what year
these are from and perhaps the book value on the set.Any help would
be greatly appriciated.Thanks,Winston.