I have recenty purchased a Colt Diamondback 38 special. It has a 2 1/2" barrel on it has nickel finish. The hammer, trigger, ejector rod, and grip screw have all been gold plated. The grips are fake ivory with Colt medallions. The gentelman I purchased it from claimed it came out of the Colt custom shop. Unfortunately there was no box. My question is that right below the serial number is a C stamped and below that in smaller letters is a cb. I was wondering if the C was for Colt and the cb was whose initials did it. Am I thinking correctly?