It also seems unlikely that each year’s production ended at a conveniently round number.
It seems unlikely that every new model was introduced exactly at the beginning of a new year. But there are problems with the existing chart, such as the timing of the introduction of the different models. Many saxophonists use it as the authority for determining when an instrument was made.
The existing Selmer Serial Number Chart has been available on the internet for years. Selmer paris saxophone serial number chart Selmer Serial Numbers – a Fresh Approach