France, Germany, Greece, Romania, and Switzerland used the Potez 63 series. Romania and Greece received some of the Potez 633s before the outbreak of World War II.
First Shot Down
On September 8, 1939, a Potez 637 was the first Allied aircraft lost on the Western Front.
There was a similar resemblance to the German Bf 110, and the Potez 63s were shot at by French and English fighters.
By June 1940, out of 1,115 delivered to units, only 663 survived. Of these 251 were in North Africa. Over 200 Potez 63.11s were lost in the initial few weeks.
After the Armistice production of the Potez 63.11 continued and these were used for training by the Germans.