Looks like an honest FTR Trials "T" to me. I'd have to agree with the Prinz that it's most likely been sanded and stained post service. I think it's just several coats of linseed or maybe Tru-oil finish, not varnish. I've been stripping gunstocks this week for customer repairs. Polyurethane on an SMLE just doesn't cut it. Yuck!! What a job.