Bloch MB.60 (France, 1930)[5][6] Bloch MB.120 (France, 1932) Bloch MB.300 (France, 1935) Blohm & Voss BV 138 (Germany, 1937) Boeing Model 80 (US, 1928) Boulton Paul P.32 (UK, 1931) Bratu 220 (Romania, 1932) Breda A.14 (Italy, 1928) Breda Ba.32 (Italy, 1931) Breda Ba.46 (Italy, 1934) Breda CC.20 (Italy, 1929) Breguet XI (France, 1916)[7] Breguet 393T (France, 1931) Breguet 521 (France, 1933) Bresciani Bre.1 (Italy, 1915)[8] Britten-Norman Trislander (UK, 1970) Brown-Mercury (US, 1928)[9]