I recently bought a 1967 FWB 300S RT with a B. Nickel (Supra) Marburg scope. It has RT dual reticles...twin post. I thought RT scopes were all 4X but this one is a variable 7X12. It does have the correct 4 knobs. Why the high power and variable ability? Does anyone have a manual for this one and if so could I get a copy? Big hunk of g !!
Thanks guys,
I now understand that 50M RT uses such scopes and that airguns are limited to 4X. I also found the Nickel websight , they are still going strong.