Serial Numbering: The first phase started in early 1969 and continued to the middle of 1970.It consisted of the following fields: For example E69PT109 was a Paramount Tandem built in May of '69. The second phase started in Mid-1970 when Schwinn started using the standard numbering system (and probably a common bottom bracket) with the company's mass production.
It consisted of six components: Paramount Tandem Serial Numbers Paramount started building tandems in 1969.
Prior to this time, only special team tandems (like Olympic bikes) were made.
Even those equipped with Suntour Superbe components usually had SR seatposts.
Many components are marked with size descriptors in addition to component manufacturer's date codes.
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.
It was a sequence consisting of a letter followed by two digits, starting with A10, followed by A11 and so on until A99. Here's a table of the codes and their manufacturing dates: For example, H7634 is the thirty-fourth frame or fork scheduled during August of 1976.
Self-Describing Serial Numbers This system started in use during the mid- to 1994's.
The Earliest Paramount Serial Numbers The very first Paramounts seemed to have had serial numbers starting with "A" followed by two or three digits.
This seems to have been a system started by Emil Wastyn.
[Atom] [Brooks] [Campagnolo] [Dia-Compe and Weinmann] [Huret] [Maillard] [Normandy] [Nitto] [SR (Sakae)] [Sachs-Huret] [Shimano] [Strong] [Sansin] [Sunshine] [Sun Tour (Maeda)] [Sugino] [Tange] [Williams] [Dancing Chain] [Saddles]The date of manufacture of a bicycle's components can often be used to determine the date of manufacture of the bike itself.