According to a 1991 Orion Blue Book I have, they were made in 1980, and sold new for $698/pair at that time.
Check out the Infinity Classics & Bobby Shreds Infinity pages. One or the other should get you your info.
The classics is mostly in german, but if you poke around there is some info in english as well.
Good luck, John
hi shay. i would love to email arnie. but frankly i think, and i'm pretty sure he hasn't been with genesis for a while now. and believe me, he's always been a celebrity to me since i got into this hobby when i was 15, 20 years ago. i used to go to rogersound labs in LA and listen to the 9kappas all the time. at that time, a simple fantasy of mine.