Originally Posted by BlankCrows

It is a ORO-BX ISO 14-1618-21-24 from 1986 and I think a 2 prong (two indentations on the face of the spinner wheel). I know the original freewheels for the bike are hard to find, and this one isn't it as I think the original big was 27t. Right now I'm inclined to hold onto it and put it on one of the high-flange hubbed wheels that will be built. The Dura-Ace freewheel on it now is a 24t big cog.