Keyed trumpet.

Technical description: Brass; with garland; two coils (small and large). Five keys arranged for left hand operation, two on bridges across instrument; with tonehole chimneys, the fifth of which is on a ferrule. The instrument could be used with a shank for F but no shank was supplied with this instrument. With crooks (913a) for E at A?=|440|Hz, (913b) for E? at A?=|440|Hz, (913c) for E? at A?=|430|Hz, each with slide fitting to instrument for tuning, a ligature screw restraint with knurled head is mounted on crook receiver on body. With a plain bit, overall length 40, possibly for use with E|crook to give A?=|430|Hz. Amado water-keys on small coil and on crook (913b).; Nominal pitch: F / E / E?.; Type or system: 5 keys.; Keyhead type: saltspoon.; Keymount type: saddles, with double-coil(water-key) springs mounted on pivots.; ; Usable pitch: built for use at A?=|430|Hz and A?=|440|Hz.; Performance characteristics: according to John Wallace, at its best in|E at A?=|430|Hz.