UBB.threads Forums Edged Weapons Miscellaneous Dagger Forum NPEA Dagger, ok?

The SP marking on your example is routed in, as opposed to stamped. Yours only has one period, and it is round. Look at the stamping on the example I posted. Maybe Ron will comment as well.

Pictures of the inside of the cross guards, the ends of the grips, and of the tang would help.