1958 Mk XII (T42)

The Mk XI, XII and XIII were identical to the Mk X and the same type number was retained as Cooper were dominating the category and Formula 3 was now in decline at the international level although national racing and hill climbs still continued in England and the United States.

Simon Frost in Mark Palmer's Mk XI on his way to victory in the Goodwood Revival, 2009

Per Hageman's Mk XII in the wet at Brands Hatch for the Iota Trophy, June 2007.