22.cal,single shot, brass barrel with 3 striker leaves.I need a trigger spring part # 857 from the hy-score 800 schematic i dl from the net.Been to all the sites i can find and called a bunch of air gun shops and no one has anything.I cant even find a picture of 1 so i can try and make 1. I think my mom bought it for my dad for Christmas in the early 1950's.Thanks for any info https://www.jgairguns.biz/800-c-78_309_586/