Supermarine Spitfire K5054 prototype, with Mutt Summers in cocpit, first flight 5 March 1936 Published on March 2, 2013 in 5 March 1936Full resolution (766 × 511) ← Previous Next → Captain Joseph “Mutt” Summers in the cockpit of K5054, the first prototype Supermarine Spitfire, 5 March 1936. (BBC)