Esto,
I had models from all the older production shops and could see a difference in the finish but not the accuracy. My 104 Supermatic Trophy spacegun (1954 Hamden/Hartford, Conn) shot no better than my my SH series Victor (1882 New York). The finish on the 104 looked like it was dipped in oil. It was perfect, shiny and had very deep bluing. The SH had tooling marks all over it and the blueing was thin and pale. With the right ammo they were both laser beams.
Threemorewishes