SN's were not required before 1968
IB-12257
41756
IB 41756
IB 41756
1B 41756
1B 41756
1b42756
IB 41756
1b41756
20-50 USD
rohm is an old German import. no value and not too safe to shoot.......
RG10 pistol-ROHM
Most likely a ROHM
GUNPARTSCORP.com and JACKFIRSTGUN.com carry lots of parts.
Most likely ROHM or RG.
If it is made in Germany and in excelent condition, it is worth $150.00.
Try e-gunparts.com
Made by ROHM.
£1.99
Inexpensive hand gun.
15-50 USD or so