This guide covers the style and formatting of Old School Diamond Back BMX Serial Numbers. For the context of this page, Old School refers to the late 1970s to mid-early 1980s, 1979 to 1984.

There are 3 main types of serial numbers found on Old School Diamond Back BMXs. We’ll cover the largest two bike manufacturers. We update this page regularly, so please check back for updates. Each resource below relates to the manufacturers which were used back in the day, they are:

1. Koizumi (Japan) see reference here Koizumi Diamond Back Serial Numbers
2. Fairly Bike Company (Taiwan) – see reference here Fairly Diamond Back Serial Numbers