These two small hammers hang out on my "old tool" wall.  They came in handy a couple of times because they are small.
Mel

I think I might have one of those! Thinking mine might have a brass grip though...

 No markings??
Hard to know if they were factory made or metalshop project made.
Hammers just like this were sometimes required work for students. Or just attractive elementary projects.
  I expect they were also made for sale to the general public, at least at some point.
  yours Scott

I'm gonna guess they're Indestro...

At least mine is!

I can't find any markings on either hammer.
Mel

Mine...




I suppose it could have been made for Indestro (rather than by), but they are pretty clearly the same hammer!

Here are more no name hammers, similar styling.

Brian L.

They do all look about the same, But mine looks like they laid out in the field longer than yours.  LOL
Mel

I've also seen some marked GM Mfg.  Not the automaker.  I know I have a few of those hammers around here, one is Indestro, have to check the others.  Now comes the hunt!