Ruger MK pistol info ???

[m4man27]

I need Information on a Ruger Mark 1 pistol with a target barrel. The SN is 15-XXXXX, which I found is a 1979 model. But on the LH side of the barrel is the name R.G. Curtis. I know that he was a gunsmith but cannot find any info on him. This pistol is a custom Mark 1, BO-MAR sight rail runs the length of the barrel. Hogue grips and custom trigger. Sweetest trigger pull that I have ever seen. This pistol is in 98 to 100 % condition.Any info you can give about gunsmith and what the pistol might be worth would be great.
Thanks Marc

 

[RKM]

There used to be a gunsmith in Yukon by the name of Curtis. I heard he worked on Rugers...could be him.