Model Variants (Including Prototypes)
LeO 45 - Base Series Designation
LeO 45.01 - Initial prototype fitted with Hispano-Suiza engines.
LeO 451.01 - Revised prototype with Gnome-Rhone engines.
LeO 451 - Production variant of the LeO 451.01 prototype for French Air Force; 222 examples.
LeO 451T - Captured models by Germany; reused as transports; totaling 50 aircraft.
LeO 451E - Post-war mark; research platform; 11 examples modified with various equipment.
LeO 451C - Post-war mark; redesignated LeO 451T models as mail transports for Air France.
LeO 453 - Post-war mark; high-speed transport; Pratt & Whitney engines.
LeO 454 - Single prototype; Bristol engines.
LeO 455 - High-altitude variant; Gnome-Rhone turbosupercharged engines; one prototype completed.
LeO 455Ph - Post-war mark; fast-reconnaissance model with SNECMA engines.
LeO 458 - Outfitted with Wright GR2600 engines.
LeO 456 (LeO 451M) - French Navy model; 68 examples.