Trivia for
633 Squadron (1964) More at IMDbPro »

• Four of the De Havilland Mosquitos seen in this film were airworthy and three could taxi on the ground. The same crash at Abindon Airfield, U.K., shot from a different angle, was used with matte painting (by 'Tommy Howard (IV)''s Special Effects team) to look like it was crashing in Norway. No shooting was done in Norway in fact. For "Norway" scenes, the mountains of Scotland were pressed into service.
  
  
• The German "fighters" were actually 4-seat Messerschmitt 108 "Taifuns," painted to look like Me-109 fighters.
  
  
• Cliff Robertson, an accomplished pilot, wanted to buy one of the Mosquitoes after filming had finished, as he was so impressed with the type. He was not permitted to do this but he later bought a Spitfire Mk IX which he owned until the late 1990s.
  
  
• Most of the attack on the Fjord at the end of the film was done with 1/48th scale Mosquito models.
  
  
• Three of the airworthy Mosquitoes used in the film were TT35 models (target tug versions of the B35 bomber). These were made to resemble FB MkVI (fighter bomber) versions by painting over the clear perspex nosecones and side windows and fitting dummy machine gun barrels. The fourth airworthy Mosquito was a T3 model with a solid nose which only required the fitting of dummy gun barrels.
  
  
• The Mosquito's used in the film were RS715 Cockpit section only TJ118 Cockpit section only TV959 At Bovingdon airfield, but did not fly in film TW117 Flew in film RS709 Flew in film RS712 Flew in film TA639 Flew in film TA719 Flew in film
  
  
• The 3-Barreled Anti Aircraft 'Nordenfelt Gun' is a triple mounted MG151/20 Drilling flak weapon that was also adopted by Yogoslavia as it was very versatile and had effective anti aircraft capability.
  
  
• Donald Houston served in the RAF during the Second World War.
  
  
• The film's opening prologue states: "This story is inspired by the exploits of the Royal Air Force and Commonwealth Mosquito air crews during World War II."
  
  

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