 Costume designer Anthony Powell found it a challenge to create Connery's costume because the script required the character to wear the same clothes throughout. Powell thought about his own grandfather and incorporated tweed suits and fishing hats. Powell felt it necessary for Henry to wear glasses, but did not want to hide Connery's eyes, so chose rimless ones. He could not find any suitable, so he had them specially made. The Nazi costumes were genuine and were found in Eastern Europe by Powell's co-designer Joanna Johnston, to whom he gave research pictures and drawings for reference. The motorcycles used in the chase from the castle were a mixed bag: the scout model with sidecar in which Indy and Henry escape was an original Dnepr, complete with machine gun pintle on the sidecar, while the pursuing vehicles were more modern machines dressed up with equipment and logos to make them resemble German army models. Gibbs used Swiss Pilatus P-2 army training planes standing in for Messerschmitt Bf-109s. He built a device based on an internal combustion engine to simulate gunfire, which was safer and less expensive than firing blanks. Baking soda was applied to Connery to create Henry's bullet wound. Vinegar was applied to create the foaming effect as the water from the Grail washes it away. At least one reproduction Kubelwagen was used during filming despite the film being set two years prior to manufacture of said vehicles.
