This was a York High/Low pitch adapter (pat. 1910).
If you bypass the loop (making the horn shorter) then it should be in High Pitch (almost a half tone sharp to A=440).
If you use the loop, then the horn should be in Low Pitch (modern A=440)
York & Holton Ebs; Conn Ebs
- windshieldbug
- Once got the "hand" as a cue

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- Donn
- 6 valves

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