If memory serves me, The 61's were long-reach calipers, 68's the short-reach version?
Aside: I have a set of old Universal levers which have enough travel, I'm sure, to be paired w/ v-brakes on a friend's MTB touring conversion; my question is, does anyone know a source for the gum rubber hoods for these levers? If anyone has an old pair installed on a bike and the gum rubber hoods are dried out/cracking, you can "reconstitute" the rubber by applying glycerine, available at a drugstore/chemist's.
Cheers,
Paul Woloshansky