50-100
in excise RG-23 PART 1 AND RG-23 PART -2 ARE REGISTERS TO BE MAINTAINED BY ASSESSEE
Gunshop.
In perfect condition the Rohm RG 23 .22 cal runs from 50-75$ hope that helps
5-45 dollars
25-75
About $50. Low quality, low value pistols
Yes. RG-11 is 75 ohm cable much the same as any other cable like RG-59, RG-6 or RG-56.
No known sn data published.
25 USD
Rohm. See link below.
No serial number data base. Most of these were from the 1960s
Best left to a gunsmith.