Here we have a little yellow bird that some readers may know is from the comic strip called "Peanuts" by Charles M. Shulz. However why he is here is for two reasons, the first is that he is called Woodstock, and the second because Mr. Schulz openly admitted to giving him that name because of the Festival, because he had seen the poster, in Life Magazine, with the small white bird on the guitar.
The curious fact is that the character first appeared in March 1966, several years before the Festival but was unnamed. He was first called Woodstock in the cartoon for June the 22nd, 1970. And the Festival ran from August 15th to 18th, 1969, but remember the cartoons were thought of, drawn, submitted for publication, and then joined the pile of other ones waiting to be printed in the magazine.
That bird was a dove of peace; on the other hand our bird has no species, and can sometimes not be very peaceful at all to his dog companion, Snoopy. Despite that they love each other dearly, and Woodstock is always ready willing and able to join in with Snoopy`s adventures.
You can read more about Woodstock, the bird, in a very delightful tribute which is housed at Wikipedia/Woodstock/Peanuts
Now as far as our card, less is known. But you did read right above, there are four hundred cards in this set, and you can see a checklist at The Trading Card Database/PSS/Peanuts.
The company was based in California and made two series of Peanuts cards. I cannot find any other set they made, so if you can enlighten me I would be interested to look those up too.
Now though the Trading Card Database cites four hundred cards this is the two sets combined as each was two hundred cards.
The cards were sold in dealer boxes or in packs of ten cards.
Series One, in 1992, celebrated the fortieth anniversary of the comic strip by reprinting the best loved strips of all time on the backs of the cards, and had two hundred cards in the base set, plus there was the promise that you may find a "Snoopy For President" Hologram card in any of those packets. They also offered an uncut sheet of a hundred cards for sale, at $14.95.
Series Two, in 1993, was very similar, reprinting the best loved strips of all time on the backs of the cards, and again having two hundred cards in the base set. This time there were two types of special inserts that you might find, either a colouring card and/or a Charlie Brown Stan Musial Hologram card. The packets again offered an uncut sheet of a hundred cards for sale, at $14.95. I am not sure whether this was the second part of series one, or selected cards from series two.