I picked it up at a gunshow. I am pretty sure it was made in the 70's i have never seen one that was 20ga over 222. The 12ga over 222 are going for around 1300 to 1500 at shows here in WV and i have seen them as high as 1750. I am really looking more for info on the 20ga over 222 exactly when it was made and how long exactly it was made. There's just not a lot of info on the 20ga. I appreciate the post