The remaining numbers indicated the production number within the month.įrom 1987 on, the two-digit prefix number plus 50 will give you the year of manufacture. The fourth character indicated the instrument: According to a Conn s/n chart, 52,000 was made in 1919) and appears to be at least 200,000 off for LH bell key horns. The serial number lists are NOT 100 accurate. The number of instruments produced in the early years 1893-1905, has been reduced. The third character indicated the year within the decade (defined by the first letter). We have reevaluated the serial number list to reflect new information. The second character indicated the month of the year The first character of the serial number indicated the decade In March of 1974 an alpha-numeric system was established: The years 1967 to March 1974 (when Conn moved their brass manufacturing to Abilene, Texas), is a period where at least some of the instruments were inferior in quality 1980-1986 numbers are inexact, and may relate only to student level trumpets/cornets

Conn trumpet serial number ge621338