One new old stock original Lucas starter main spring (made in the United Kingdom), part number 250652. This fits:
Morgan Four/Four 1939 - 1950
Lanchester 10HP 1946 - 1951
A.C. Petite 1953
Armstrong Siddeley 12 1936
Hillman Minx 10 1937 - 1948
Morris Minor 1929 - 1935
MG Midget 1929 - 1936
Morris 8 1935 - 1937
Sunbeam Talbot 1946 - 1949