serial number - A serial number is a unique number assigned for identification which varies from its successor or predecessor by a fixed discrete integer value.
- the unique code that identifies your bicycle, also referred to as a frame number.
- A number showing the position of an item in a series, esp. one printed on paper currency or on a manufactured article for the purposes of identification
- (SERIAL NUMBERING) The numbering of a printed product in sequential order. Usually for tracking and accountability.
specialized - Highly skilled in a specific field
- developed or designed for a special activity or function; 'a specialized tool'
- Requiring or involving detailed and specific knowledge or training
- Windows Embedded (POSReady) · Windows Preinstallation Environment · Windows Fundamentals for Legacy PCs
bike - bicycle: a wheeled vehicle that has two wheels and is moved by foot pedals
- motorcycle: a motor vehicle with two wheels and a strong frame
1981 Specialized Sequoia Bottom Bracket
In later models the size of the frame was on one side and a serial number on the other. This was all together. This frame is 47cm. I believe the earlier Konno bikes only had the frame size, the bikes that followed these were made by Miyata & have a M at the beginning of the serial #.
Bottom bracket shell
'1' probably means 1981, and '50' is the serial number? Edit: '50' is the frame size, the '1' I don't know. Apparently the frame is a 1982 model, not a 1981.
