| Probably this pic would clarify my question. The trumpert on the pic have to vent holes operated buy keys and one water key...any idea how exactly do you use the second one?
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Spada Bach B flat 72, leadpipe 2L/DWMM1.5C
Spada Bach C 256, leadpipe 2LQ/DWMM1.5C
1956 Olds Ambassador Cornet
Spada Custom Piccolo
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