F/Bb Double Horn · Model 203ST

The double horn has established itself as the orchestral instrument of choice. The combination of full Bb and F horns offers the musician great flexibility in intonation and tone. There is also a definite correlation between mass and tonal projection. With full double horns the thumb valve serves to change to either the shorter Bb horn or the longer F horn.

Model 203ST is built according to the French “ascending” system, in which the third valve raises the pitch (in F as well as Bb) by a whole tone. 203ST is equipped with a second thumb lever to operate the 5th valve. The musician can choose between half tone or stopping length by a removable extension slide.


Bell flare diameter:
Bell throat:
Body size:
No. of valves:
No. of thumb valves:

F/Bb or Bb/F
12,1 mm
310 mm
Medium large
Yellow brass, gold brass or nickel silver
Fully independent Bb and F valve slides
Third valve ascending (French System)
Valve in A and stopping valve