 The prototype was delivered to the "Aéronautique Militaire" amongst a batch of LeO 20s in 1928 for evaluation.This was redesignated LeO 252 in 1929 after an engine change, and a second, generally similar machine was purchased by Romania.In 1931, the LeO 252 remaining in France was fitted with wooden floats and handed over to the "Aéronavale", forming the pattern for the majority of LeO 25s which would be produced as seaplanes.