Campagnolo dating codes
This clearly is when the component was made and not when the bike was made, but unless the component or bike manufacturer had lots of stock lying around in inventory, the date should be a fairly good indication of the year of the bike.At least it would be the earliest date that the bike could have been made.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.This can be simple like "0784" (month 07, 1984) or a clock-type, with year in the middle and a ring of numbers with a tickmark pointing to the month." "Dia-Compe road levers usually have a code stamped _inside_ the lever.Pull the lever and look inside the top of the lever arm for a code such as "1084." Dia-Compe extension levers (yuck) also tend to have date codes on the side that faces the brake hood.In this website we have made an effort to credit the people involved in the development of these codes.
Many components are marked with size descriptors in addition to component manufacturer's date codes.Ben writes: "Brakes and brake levers often have date codes on them.Weinmann and Dia-Compe calipers usually have codes on the back of a caliper arm.The date is on the back side of the arm near the spider of the crank, typically of the form of the two-digit year above a letter, apparently representing the month.An SR Custom crankset, reported by Alan Burnett, has the back of one arm marked only with a 1 and the other arm with a 2. Alan suggested, like for Campy crankarms, these are the last digit in the year; i.e. Does anyone have a similarly marked set of SR cranks?
Steve Mann reports a mid 70s SR seatpost which is marked with a date code of the form 76.9, where 76 is the year and 9 is either a fractional year or the ninth month of the year.