Here is an item I found in my stacks while looking for something else. I picked this sheet up backin Jan of 1986 at the Campbell, CA post office. I didn't notice anything till I go home and looked at it.
I like to call this the "Dog and Ball" printing glop! I do not know if it is of any value other than the curiosity value. Makes a "fun" keeper.
Note the main Ball is on the third stamp. You can see a smaller "ball" at the base of the "V" of the first stamp.
Enjoy.
