NOS Lucas 34460 reverse lamp/ overdrive interlock switch. This is equivalent to the Moss Motors 140-470 or 141-100 except that is an original old stock part made in England in the late 1960s or early 1970s. It fits most Jaguars, Austin-Healey 100, 100-6 and 3000, Triumph TR4, TR250, TR6, TR5, MGB, MGC, and many, many other British cars.