A Trumpet stop pitched an octave lower than normal, at 16' or 32'. Wedgwood and Maclean maintain that it is usually identical with or slightly more powerful than the Contra Fagotto. Hopkins & Rimbault characterize its tone as weaker than the unison Trumpet; Irwin calls it free, brilliant and fiery. Strony reports that �no theatre organ builder made a practice of building Trumpets that extended all the way down to 16' pitch�; thus theatre organ Double Trumpets ended at tenor C.
Osiris contains about six dozen examples of Double Trumpet, all at 16' pitch except for one at 32', and four at 8' and 4' which are ill-named extensions of 16' stops. Osiris also contains five examples of Contra Trumpet, all at 16' pitch, and thirteen examples of Contre Trompette, all in organs in the USA dating from the second half of the 20th century and all at 16' pitch except for one each at 32' and 8', the latter most likely a misprint.