I think that you're right, a 72-73. The guys on sttickbow.com told me that my Hi Speed is a 1974, the first year curved stripe. What a shooter! And pretty too! I love this elevated rest.hey. ive got a dh high speed similar to yours..mine is a 40# 58inch that I believe is from 1972-1973. shot my first deer with it when I was 12 yrs old in 1974.was wondering if you found out what year yours is? if you want pm me your phone # and i'll text you some pics of mine.nice bow!