I was going through some old files and found the insurance card from my purchased new 1974 Jackpiner. The SN is 5440473178. On a long shot, I'm trying to track down the bike. I haven't been active in POG (still a member) for several years, but I still have my 1972 Jackpiner that I rode at the 30th Anniversary ISDT.
Also found my original ECEA card No. 18096.
Gary,
Did you look in the "Production Year" section to see if it might be registered? A POG member may own it.
Good Luck,
Tony