Complex sentence: The third variant and the first to fly on 1 March 1949 was a convertible passenger/cargo aircraft and designated the Breguet 892S Mercure, although based on the 890H the 892S had four Renault 12S inline piston engines.
Split into simpler sentences: The third variant and the first to fly on 1 March 1949 was a convertible passenger/cargo aircraft, designated the Breguet 892S Mercure. Although based on the 890H the 892S had four Renault 12S inline piston engines.