This company does fantastic reproductions of any type of tag. Set up is what hurts. Amazing work. I was just clued in on the tag differences a few years ago. To me easy to tell what was retagged. Now was it just because the tag was damaged or a fraud. Never know till you pull it apart and check numbers, but clocking is a hint also. Hell of alot into this stuff than you would think. Now this pre 50's stuff is really interesting. you definately need the books for them for info.