"Otter switch". for choke solenoid. Jaguar: Mark II 3.4, 3.8 and 340 (1959-67) • XJ6 Series I with SU HD8 thermo carburettors • XK120 from engine no. W1251 • XK140, XK150 and XK150S (1954-61). Rolls Royce and Bentley: Rolls Royce Silver Shadow I plus Bentley T1 from 1971 to 1975 (from VIN.12684 to 22117).