Brand directory/Conn/Models by year/30I
Model catalogue

Conn 30I euphonium.

Wonderphone double-bell front euphonium, 5 valve short action — Introduced 1935 · discontinued 1946.

Maker
Conn
Model code
30I
Line
Wonderphone
Instrument
euphonium
Introduced
1935
Discontinued
1946
Status
Retired
Record confidence
Medium
Era check

Serial evidence places this line in the Elkhart era — your serial number decides which one your instrument is.

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