What size is it? Did you weight it? I'm curious if it's 8 ounces. That big "000" mark looks like a primitive size marking for 8 ounces. I don't recognize the logo, but that's also primitive with the name and the location and STEEL CASTING mark.
I sure wish I could bring some of my stories over to this section...long story short version, this was one of my favorite stories to work on but not many people saw it I think they were all involved in Mr wild Cowboy and his stories so my story took a back seat.
NJ this is who made your ball peen hammer hope you enjoy the short story.
Good one, Woody. Now that I see Hammond used a "2" for a 24 oz ball peen, I'd bet my next paycheck that NJ Marty's "000" marked Hammond is an 8 oz hammer.