A Bombarde stop pitched an octave lower, at 16' or 32'. It is common in large French organs. Audsley describes its tone as �dry and hard�. Starter pneumatics are sometimes used to obtain prompter speech. Both wood and metal resonators have been used. Bonavia-Hunt considers it synonymous with Contra Bombardon.
Osiris contains about a hundred examples, three at 16', the rest at 32'.