How long was Raymond William "Ray" Butt's most famous television show originally broadcasted?
Ray Butt: Raymond William "Ray" Butt (25 June 1935 – 12 July 2013) was a British television producer and director best known for his work on "Only Fools and Horses". Only Fools and Horses:  Seven series were originally broadcast on BBC One in the United Kingdom from 1981 to 1991, with sixteen sporadic Christmas specials aired until the end of the show in 2003.
from 1981 to 1991