According to information on Selmer's trademark application, the stand-alone 'Signet' name was first used in 1947. Stand-alone meaning just the word 'Signet' inside the oval logo. The application specifically says that 1947 was its 'first use anywhere', which implies anywhere in the world. In comparison, the earliest Selmer trademark application states that the first use of the Selmer name on musical instruments dates to 1886 even though their first US trademark application wasn't processed until 1931.

The existing Selmer Serial Number Chart has been available on the internet for years. Knigu vse ob ocenke brilliantov. Many saxophonists use it as the authority for determining when an instrument was made. But there are problems with the existing chart, such as the timing of the introduction of the different models.