Even those equipped with Suntour Superbe components usually had SR seatposts.

Unfortunately, many of these are coded, and require some additional knowledge to understand the code.

If you know of other components that are marked or coded that can be added to this list, please let me know.: The information on this page is copyrighted.

Especially useful, and challenging to sort out and verify, was the Shimano code.

Also gathered on this page are date codes decoded and generously provided by others.

Weinmann and Dia-Compe calipers usually have codes on the back of a caliper arm.

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.The Appendix gives dates of initial manufacture for the vast majority of derailleurs made from 1920 to 1999.Other manufacturers of bicycle components have date marks on their pieces.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.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.