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Natural trumpet.

Technical description: Brass; 4½ coils; with garland and a single ferrule-covered joint between bell-pipe and the main body of tubing. There is provision for tuning by a sliding mouthpipe, restrained by a ligature screw on the body.; Nominal pitch: 7-ft D.; Type or system: Coiled.; ; ; ; Usable pitch: Probably built for use at A?=|440|Hz.;

  • Measurements:Overall size: from plane of bell to far coil 287 ; bell 111.; Sounding length: minimum 2157.; Bore: mouthpipe at c|75mm from mouthpiece receiver (minimum bore) 10.43; at 1079mm from bell end, c|10.55; at c|284mm from bell end, 14.9; at 26mm from bell end, 62.B|=|0.82.Bell poorly approximated by a Bessel horn.Dia of mouthpiece receiver: m.r.t. 11.85 - 10.7.