My collection of battle axes is rather modest, I started collecting these only a few years ago and so far have 4,5... # 1, 3 & 4 are A-axes, almost identical to the viking axe. # 2 is a C-axe.
The top 1/4 of the handle on the axe to the left is the original from the 1600s, the rest of the handles are "new" - probably some 150 years old in average.
The one to the far right is a "bergmanns stav" - a miners staff from 1792. These usually came with a symbolic brass or kopper axe head, but this one is all birch. It's origin might be from the Kongsberg silver mines or the Røros kopper mines.
I find that it belongs in an axe collection although it really is not an axe.
Trond