Technical description: Brass. Angled mouthpipe, ligature fixing for adjustment of playing angle. Final section of bell flare fitted to bell-pipe with flanged joint and secured with two screws with knurled heads, the bell mouth can to rotated to point in any desired direction or detached for convenience when not in use. Valve type: 3 Périnet valves, bottom-sprung; alignment by key on piston.
Overall size: 1325; bell 668.
Sounding length: minimum without bit, 5485; overall air column length of bit 73.5.
Bore: mouthpipe at c 30mm from mouthpiece receiver (minimum bore) 13.4; centre of valve cluster at c 470mm from mouthpiece receiver, v.t.s. bore (1,2,3) 18.2; m.t.s. at c 733mm from mouthpiece receiver, tuning slide bore 18.2; 2743mm from bell end, c 53.1; c 1890mm from bell end, 75.1. B = 0.35.
Dia of mouthpiece receiver: m.r.t. 14.7 - 13.8; bit internal taper 13.9 - 13.0; external taper 13.3 - 14.1.
No inscriptions on bell. inscribed on side of valve casings "1", "2 / HAWKES & SON / LONDON / 1", "3".
Playing accessories: With slightly curved short bit, silver plated brass with no inscriptions.
Bell securing screw and nut lost.
Usable pitch: Plays at A4 = 439 Hz.
Purchased by lender with and probably formerly used with mouthpiece (801).