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. very rare conn trumpet 1919 new wonder 3b burnished gold plate amazing - 995. Nearly all trombones have a telescoping slide mechanism that varies the length of the instrument to change the pitch. Like all brass instruments, sound is produced when the players vibrating lips (embouchure) cause the air column inside the instrument to vibrate. Full Serial Number Chart Conn Serial Number Ranges By Model. The trombone is a musical instrument in the brass family. The fourth character indicated the instrument: Trumpeter Models New Releases 2020 Trumpeter Models New Releases. The third character indicated the year within the decade (defined by the first letter). ![]() 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
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