This looks like a bricklayers hammer on the OUCH end, but the pointy end seems too short.
Has it been ground down? Or is it a different type of hammer?
Stanley on the side
(https://farm6.staticflickr.com/5528/14146108593_98dac7c551_z.jpg) (https://flic.kr/p/ny3vf2)AMAY 055 (https://flic.kr/p/ny3vf2) by skipskip (https://www.flickr.com/people/47985875@N00/), on Flickr
i would say ground,,,but i cant take my eyes off the wood!!!
Maybe just completely worn out.
Mike
Maybe used to dig through 6' concrete prison walls?? (Shawshank?)