Looks like a bevel gauge
I thought that as well, but when you google bevel gauge, it looks different and seems adjustable?
Yeah you are right! I suppose newer one are lockable to allow you to keep the angle, maybe this is it in primitive form
http://www.ebay.co.uk/itm/Vintage-S...D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557I thought that as well, but when you google bevel gauge, it looks different and seems adjustable?
First pic I instantly though of a device for Chinese torture methods for some bizarre reason?