I recently bought an old (early-to-mid 80's) Univega frameset, with a seat binder bolt sleeve I've never seen before. (I've attached an illustration of what it looks like.)
I bought a Sugino bolt for it, but it didn't fit.
What sort of bolt should I be looking for, and where can I find one?
edit: It's not a jpeg! It's not supposed to be blurry! I swear, click on it!
— Oh, and measurements are in mm, of course.