You may need to pull the whole barrel, as mine says Jukar Spain, and yours might too, below the stock line. It is also possible since some were made as kits that the stamping, which is quite shallow, was polished out.
Mine shoots quite well, and I have no problems or worries shooting PRB from it. 60 grains 3Fg works great. I tried T/C Maxi-Balls from it once, but they flew like a football kicked for a field goal. Mine was $68.99 from Best & Co in 1978.
They are "authentic" enough to qualify for a "traditional" shoot that allows caplocks, but just barely. I kept mine for a loaner gun for BP season and for my kids. I added an Uncle Mikes "hot shot" nipple and a cup around the base of the nipple.
LD