The one which was attached is the LB size small one from the original pictures without a butt disk, the initialed one came along with it so im thinking it might be original, it has no cut outs for a saftey, and the knob bottom pasrt of the buttstock handle part where your hand goes is rounded, perhaps an unfinished surp part or maybe they made rifles with them this way, it uses the same standard enfield buttplate. I will post pics of both shortly.