This is my first 336. I do collect 1894s. I bought it to hunt with a while and thought I might sell it later. When I got home my wife said happy Father's Day now you can't sell it. It is in my favorite camo pattern, mossy oak break up. Enjoy the pic. Is this a factory correct rear sight. The first two of serial is 97 so is it 2100-97=2003 date of manufacture?