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Technical description: Brass; bell without gusset, with garland. Coiled crook without tuning-slide, with tenon acting as a tuning-slide; ligature restraint. Shaped pillars to support instrument on both hands; also ring for neck strap. Two keys for R3 overlap, the G♯ key also opens the G key. Two keys for R0 separate, the key for F♯ mounted on a bridge across the two tubes. SATK. Screw adjuster to control opening of bell key. Guard over G♯ and A keys.No fitting for music-card holder.; Nominal pitch: C.; Type or system: 11 keys.; Keyhead type: round, slightly cupped.; Keymount type: All keys apart from F-sharp key mounted on rods with needle springs, the F-sharp key mounted on pillars with leaf spring with channel for spring, SATK. Rods work between pillars; the pillars for seven lowest keys mounted on plates on ascending tube, pillars for the four highest keys mounted on brackets on descending tube.; L0: @I{D.L1: @I{B.L2: @I{C♯.L3: @I{E♭.R0: @I{E, F♯.R1: @I{B♭.R2: @I{A.R3: @I{G; G♯.R4: @I{F; F♯.; Usable pitch: Probably built for use at circa A₄=|452.4|Hz.

  • Measurements:Overall size: 990; bell 209.; Sounding length: 2452 (all keys closed).; Bore: crook at c|22mm from mouthpiece receiver (minimum bore) 11.4; tuning-slide leg from 360mm - 405mm from mouthpiece receiver, 19.1; tuning-slide leg from 510 - 554mm from mouthpiece receiver, 23.7; crook from 888 - 970mm from mouthpiece receiver (tenon), 33.0; at 1226mm from bell end, c|43.0; at c|779mm from bell end, 60.8.B|=|0.31 (all keys closed).Dia of mouthpiece receiver: m.r.t. 12.0 - 11.45.