@cudak888
yeah i thought that just popping out a guess like Chorus was quite bold , but i have/ had a few of those Chorus crank sets and they looked just like the 1 in the op'er pic . the only thing that is throwing me off is the arm bolt dust cover . none of mine have that nice dust cap cover . could it be the Athena crank =?
here is the 91 catalog
http://tinyurl.com/5e2evs
your refering to . they are very hard to distinguish

cheers
//T