Timeline of the MINI (ADO15) Elf/Hornet varient
October 1961 - Riley Elf and Wolseley Hornet introduced with 850cc Engine and no body seams.
April 1962 - Body seams appear and over riders appear
1962 - Baulk-ring syncro introduced. Leather replaces Leather cloth. Rear seats improved. Diaphrams replace webbing straps.
November 1962 - MkI Elf and Hornet discontinued.
Total MKI produced, Elf = 3522, Hornet = 3166
November 1962 - Mk II Elf and Hornet introduced with a 998cc engine and twin leading brake shoes on front. Counter balanced boot lid.
May 1963 - Plastic window catches replace chrome.
September 1963 - Improved Dampers fitted.
September 1964 - Hydrolastic suspension fitted. Diaphram clutch. Combined Starter /ignition fitted. crushable sun visors and plastic framed rear view mirror.
May 1965 - Automatic transmission introduced
October 1966 - Elf and Hornet MKII discontinued.
Total MKII produced, Elf = 17816, Hornet = 16785
October 1966 - Mk III Elf and Hornet introduced with roll up windows, Cooper type remote gear shift and optional heated rear window.
October 1967 - Re-designed seats. New stalk control. Plastic cooling fan. Automatic optional.
August 1968 - All syncro-gearbox introduced.
August 1969 - Riley Elf and Wolseley Hornet discontinued.
September 1969 - Austin, Morris, Riley and Wolseley names dropped. Marque name becomes Mini.
August 1969 - MKIII discontinued. Total MKIII produced, Elf = 9574, Hornet = 8504
Grand total: Elf = 30,912 and Hornet = 28,455
Many thanks to Tony and a few mini sites for this information.