Campy Micro adjustable seat pins: My early 70's info show two seat posts one for 36 mm wide rails and the other for 20 mm wide rails. My Brooks B17s are 36 mm, measured to the inside as the Campy info shows.The 36mm states is for short adjustment front to back and the 20 mm shows for long adjustment. My Brooks B17 is definitely short but it fit perfectly The relief on the pivots I have facing the front to allow the saddle to be pushed back as far as possible. Best post ever made IMHO...
Bill McCune
Parker Colorado