Sorry- no production records for the RG revolvers. Most of these were from the 1960s- import to the US of most were blocked in 1968.
20-60 USD or so
RG10 pistol-ROHM
rohm is an old German import. no value and not too safe to shoot.......
With a hammer, ;)
1950s- 60s
You will need to see a gunsmith.
10-40 USD
20-80 USD or so
No published sn data. 20-60
10-40 USD
Very little. This is good fodder for a gun turn-in program.