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Nominal pitch: C. 9 keys. Technical description: Brass; bell without gusset, with French rim. Bow guard with knob. Folded crook with tuning-slide. Round pillars to support instrument on both hands; no ring for neck strap. Screw adjuster to control opening of B key. Fitting for music-card holder. L0: @I{D. L1: @I{B. L2: @I{C♯. L3: @I{E♭. R0: @I{E. R1: @I{B♭. R2: @I{A. R3: @I{G. R4: @I{F. Keyhead type: round, slightly cupped. Keymount type: pillars with leaf springs running in channels between the pillars, SATK. Usable pitch: Probably built for use at A₄=|435|Hz but crook shortened for use at A₄=|452.4|Hz.

  • Measurements:Overall size: 1090; bell 209. Sounding length: 2499 (all keys closed). Bore: crook at c|15mm from mouthpiece receiver (minimum bore) 11.55; tuning-slide leg from 291mm - 336mm from mouthpiece receiver, 20.55; tuning-slide leg from 444mm - 494mm from mouthpiece receiver, 22.95; crook from 719mm - 819mm from mouthpiece receiver (tenon), 30.45; at 1250mm from bell end, c|46.0; at c|721mm from bell end, 65.05.<i>B</i>|=|0.30 (all keys closed).Dia of mouthpiece receiver: m.r.t. 11.9 - 11.55 over 15mm.