The stamp says Atha Tool Co. It's marked number 8. It has an odd shape - not sure its a regular sledge hammer head. I plan to put a shortish handle on it and use it as a deadblow/club hammer. I'm also interested to try and date it if possible?

Thanks!

try this posthttp://www.papawswrench.com/vboard/index.php?topic=6124.0

Thank you for posting that. I did already look at it and does help unfortunately because the hammer heads are different to mine.

Elliot, yours looks like an old rail road spike hammer. At 8 lbs. I would put a long handle in it like original. The way the head tapers on both sides was for hitting the inside spikes easier.

Thanks a lot papadan!

Coal hammers were similarly shaped. 

Thanks