Originally Posted by 1987

Thanks 753proguy, interesting with another opinion and the best name for it so far "overshift pin". My vintage rides all dates before 1972 and those chainrings does not have the overshift pin. Can someone else get this time frame more narrow, right now it's 1972 (1973) - 1978.

If someone can find some reliable historical text source on the net.

Or can the overshift pin date from the same time as when Super Record was introduced, 1973 / 1974?
http://www.velobase.com/ViewComponen...m=122&AbsPos=8