stamp hoarders R' us

I must say, this is the weirdest stamp i have seen in a while. my grandmas stamp collection has taken on a life of its own in our basement, and these little beauties are just a small sample of the weirdness. I wasn't expecting to find anything like this down there, but why should i be surprised? who knew my sweet little old grandma was a seemingly obsessive compulsive stamp hoarder? and is it wrong that i seriously just want to use them to mail all my letters?