UEDIN · 1699
Helicon. Nominal pitch: E♭.
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Description
Circular bass. 3 valves. Technical description: Brass. Valve type: 3 Périnet valves. Overall size: 1009; bell 352. Bore: m.t.s. 15.2 - 16.2, v.t.s. (1,2,3) 16.4. Dia of mouthpiece receiver: m.r.t. 13.3 - 12.8. Inscribed "EXCELSIOR SONOROUS / CLASS A / HAWKES & SON / Denman Street / Piccadilly Circus / LONDON / W.L.D.S. / 24 / APRIL 1911"; on back of bell "27601". Usable pitch: Plays at A4 = 439 Hz. Purchased by lender with and possibly formerly used with mouthpiece (1161).
Measurements
1009; bell 352.