As threatened, I took this pic of my favorite go-to 'heavy' hammer plus an unusual all-wood mallet.
The one I think of as a "European style Engineer head" was a cheap garage-sale buy cause the handle was bad, but an easy fix with a new USA hickory replacement and the full hammer now weighs 36 oz.
My guess is it may have been a 1200g head and I think the handle had some remnants of a German brandname (long gone so I can't confirm anything) the head still has traces of red paint.

The all-wood (beech or birch I believe) mallet has been misused a little on "things too hard" so dents are present on the contact surfaces but it's still usable (only for tapping wooden handle tools).
The design reminded me of "Japanese" but with the North European wood it was likely made somewhere there, but no ID marks at all

https://cimg2.ibsrv.net/gimg/bikefor...8627d567f.jpeg

the wooden one is pretty classic woodworking mallet, in the Euro tradition

Not so hard or so soft
 

Originally intened for flaking flint but it ha become a multi task tool.
https://cimg7.ibsrv.net/gimg/bikefor...d8c003ecee.jpg

"flaking flint" as in making arrowheads or spear points?
That has to be the most unusual specialty hammer I ever heard mentioned.
Anywhere.

Got a new bowling ball a few months back. Liking this one a lot. Been getting into the 180s more frequently.

https://live.staticflickr.com/65535/...21353c88_b.jpg

This is most of them.
 

https://cimg2.ibsrv.net/gimg/bikefor...7ea95598a5.jpg
Some original handles, some not. All have been used over the decades for various things.
The ball peen on the left is beryllium alloy for non sparking. The East Wing framing and the Atlas chipping hammers I bought mid 70's. There's a big splitting maul around here somewhere but I can't find it. The tamper is on it's 3rd handle. Not shown is a Craftsman claw hammer purchased by the wife way before we ever met, not to leave the house.