No such Ruger ever made
Zero. Ruger never made the P38.
Colt has never made a 9mm ruger combat commander
You are aware that Ruger has made .22 caliber rifles, pistols and revolvers? You have to give information to get information.
I do not believe you have a Ruger, but an RG- Rohm Gemeinschaft. Two very different companies. The RG is generally a low value, low quality firearm that was made in Germany. Value is based on condition, but may be $25-$75.
@ one percent
The value of the Blackhawk will be quit a bit higher due to the fact they only made a limited number of them. A person cant really determine the number value with out seeing both weapons
Yes, Ruger made them
100-400 USD
Impossible to answer without a detailed description and pictures.
Unless I have missed something, All Ruger firearms are made in the USA. Other makers brand forign made guns. But none of Ruger firearms are forign made.
Ruger has extensive sn data on their website.