I stopped by a neighbor's house yesterday to give him an old hand separator oil can I found in my sister's barn. Very old with an unusual 2 spout top on the quart can. I saw this tiny hammer hanging on his workbench and asked him about it. He said it was issued to him at the phone company years ago because the boss wouldn't allow them to use a staple gun on wires in a customer's house. He said the company bought these by the box and he gave me this one.
The head is 1-3/4" long and the smallest ball peen hammer I have ever seen and now in my box.