One new original Lucas 14TR alternator voltage regulator (made in England), part number 37596, UCB105, UCB104, UCB109, 37648. This is a four wire unit (red,black, yellow & white). This fits:
Triumph Stag 1973 - 1975
Austin Mini 1973 - 1978
MG Midget 1500 1975 - 1980
MGB 1973 - 1978
Triumph Spitfire 1974 - 1980
Triumph GT6 1967 - 1972
Triumph TR7 & TR8 with A.C. 1977 - 1981
* for 16, 17, & 18 ACR Lucas alternators