 Many combo organs were produced in such countries as Italy or Japan, yet some more common models used by major acts were manufactured in the United Kingdom or the United States.Organs that are intended to emulate the sound and characteristics of a Hammond organ are not generally regarded as combo organs; see clonewheel organ.-- They have been sold to the public from 1946 to present, beginning in Germany with Jorgensen Electronics then gradually spreading worldwide by the 1960s.