Lioré et Olivier LeO H-246
The Sud-Est LeO H-246 was a large four-engined flying boat from the late 1930s. == Development and design == The LeO H-246 was designed by the French aircraft manufacturer Lioré-et-Olivier to meet a 1935 specification for a commercial flying boat for use on the Mediterranean routes of Air France.
Source: Wikipedia — Lioré et Olivier LeO H-246 (CC BY-SA 4.0)