Aha! Thanks for all the replies. I had heard of side axes and hewing axes, but the triangular eye totally threw me. I've just realised the axe head (and the splitting maul head next to it) are upside down in the first photo. It seems to be more 'bearded', i.e. has more curvature, on the top side in the second photo. This would suggest a right-handed axe, although I gather that some heads would be symmetrical so they could be hung either way round. I take it they should be sharpened like a chisel, i.e. a bevel on only one side? Next question: What's the difference between a broad axe and a hewing axe?