On the local consignment sale

roofing hammer?

Yup roofing, you can split the wooden shingle and then nail it down.

And I think, pull nails with the notch.

A good carpenter never has to pull a nail.

yep

With that rounded head I would say old timers used to use it for sheetrock. The blade was used to score it.

Boot and shoe makers and shoe repairing hammer has those round large heads. I got some from grandfather who built boots and repaired shoes.

I'd say a wood shingle/shake hammer.

well, we got it narrowed down to a bunch of stuff...

That’s easy; that’s a Savell Smacker

Best one yet.

Looks more like a drywall hammer to me.

drywall hammer, the convex head dimples down the nail.....I don't know anyone that uses them anymore....more of a tool when the old timers used rock lathe

It's definitely a sheetrock hammer but I've seen them used in the roofing trades also
And I've seen roofing hammers used in the drywall trades

20scout is correct.

Keith

That notch is for pulling nails. Looked like a shingle hatchet/hammer to me. For cedar shakes. Hatchet to split the wood shingles to fit on ends of runs. Hammer for the nails.
Jim

Clearly it is a hatchahammer

I'm guessing they were origianally shingle hammers that were then adopted by sheet-rockers. Gypsum board is a fairly recent invention.