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Vintage Detail

Bach Corp 12C

Tenor TromboneAlto Trombonepre-war · 1928–1961⚠ Unverified

Core Specs

Bore Size0.485" (12.32mm)
Shank Typesmall

Archive Context

Compatible With
0.485"0.500"
Confidencemedium
Confirmations0

Archive Notes

Made by Bach Corporation, New York, before the Selmer acquisition in 1961. The New York-era 12C has a smaller bore than the later Mt. Vernon versions. Widely used on small bore tenor trombone and alto trombone. Use these measurements as a comparison starting point: fit and response still depend on the player, dental structure, instrument receiver, and each manufacturer's measuring method.

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Forum Sources

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Resistance5/10
Rim Comfort5/10
Brightness5/10

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