Swiss Air Force
The first prototype was built in 1953 and flew on 3 September, the same year. The Swiss Air Force received 72 examples of this aircraft while the Brazilian Navy acquired six. The Swiss Air Force used the P-3 as a training aircraft until 1983, although it continued to be used as a liaison aircraft for another decade. In 1993–1995, 65 ex-Swiss Air Force aircraft were sold on the private market.