Hello All, I was able to acquire my first Finnwolf and wondered what these photos may convey to some of the experts...? This gun looks used but not abused... Some of the questions I have are; The age based on four digit serial # starting with 4? The number on the bolt matches / no import stamp under the barrel. Three holes in the back base mount? Factory drilled? I have heard some came with three and some two? Front Sight and hood factory? Ramp Sight says Williams on the side? Thanks Collectors!