Hello, I'm new to the forum and my first question is about determining the age of my Model 27-2. It has a 5" pinned barrel and recessed chambers. There are two numbers inside the crane and I haven't been able to find either one by searching the various serial number sites. The first one is N 102XXX and the other one is 11XXX with no prefix. There is also a delta symbol and a stamped G-2. Any info is appreciated.