As the post horn became more popular for orchestral settings composers like Mozart and Beethoven incorporated them into their music with the instrument being played by the horn player of the orchestra. This instrument has additional crooks, just like the orchestral horn, which allowed it to be played in a number of keys.Pitched in C with crooks for Bb and F. The tuning slide allows the instrument to play in B or A.
Charles Kretzchmann (1777-1870) was a German brass instrument maker who established a workshop in Strasbourg. Trained as a maker in Saxony, Charles worked in Strasbourg until his death, at which time he was succeeded by his son Charles Aguste (1818-1888). Charles Aguste was one of the many makers to be fined for infringing on Adolph Sax’s patents.
Circular post horn made of brass. Pitched in C with crooks for B♭ and F. The tuning-slide allows the instrument to play in B♮ or A. The classical post-horn without valves or finger-hole.
Sounding length: minimum 1278; overall air column length of crooks: (a) 175 (1 coil), (b) 611 (2 coils).
Bore: crook (a) at c 20mm from mouthpiece receiver, 8.3; crook (a) at distal end (minimum bore), 7.2; crook (b) at c 30mm from mouthpiece receiver, 8.2; crook (b) at distal end (minimum bore), 7.2; instrument body at c 35mm from mouthpiece/shank/crook receiver (minimum bore) 8.7; m.t.s. at c 232mm from mouthpiece/shank/crook receiver, tuning slide bore 10.0; 639mm from bell end, 10.4; c 256mm from bell end, 14.7.
Dia of mouthpiece receiver: internal tapers of crooks: (a) 8.7 8.4, (b) 9.1 8.7; external tapers of crooks: (a) 8.4 8.7, (b) 8.4 8.8; shank/crook receiver taper 9.5 8.9.
Usable pitch: Can be played at A⁴ 440 Hz.