Campagnolo dating codes

I have a set of Dia-Compe mountain levers where if you pull the lever all the way, a piece of the lever is exposed, which has a clock-type date code.

Seatposts are marked with outside diameter, also in mm.

For old Treks, 27.2 is the most common, but for other bikes the diameters can range from 25mm to 33mm.

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For Treks, the SR date markings are especially important.

Virtually all of the Treks not equipped with Campagnolo or Shimano Dura-Ace components, started life with some grade of SR seatpost and may also have SR stems, bars or cranks.

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Other manufacturers of bicycle components have date marks on their pieces.

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