This is a nice vintage Peanuts poster.
It's extremely rare, and seems to have been custom-made for Phillips Academy in Andover.
I can't find another one anywhere.
It has minor stains on the top and has been mounted to a board.
The discoloration on the back is from the wire on the back of the frame it used to be in.
It's in good shape and displays very well.
It measures 28" x 20".
Thanks for looking!