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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: saddles with channels for springs.; 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.; Usable pitch: Probably built for use at circa A₄=|452.4|Hz.

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  • Inscriptions:Stamped on bell garland "Metzler & Co,, / London." (the inscription to be read with bell down). Stamped on bow guard blade "20"; stamped on A|key "20"; on other side of A|key in two places with a sunburst.
  • Hornbostel-Sachs category:423.213-71 Labrosones with fingerholes and with keys, with (wider) conical bore
  • Repository:Royal Conservatoire of Scotland
  • Measurements:Overall size: 1084; bell 209.; Sounding length: 2485 (all keys closed).; Bore: crook at 15mm from mouthpiece receiver (minimum bore) 11.75; crook tenon from 757mm to 840mm from mouthpiece receiver, 29.95; at 1243mm from bell end, c|44.5; at c|761mm from bell end, 62.95.B|=|0.31 (all keys closed).Dia of mouthpiece receiver: m.r.t. 12.15 - 11.75 over 15mm.