Buscaylet et Cie produced aircraft under subcontract 1916-18. Reorganized post-war as Buscaylet Père et Fils-Bobin, hired Louis de Monge as designer and began with Buscaylet de Monge 5/2, parasol monoplane fighter first flown at Villacoublay early 1923. Based on de Monge 5/1 racer, and judged 'too modern' for service use. Advanced monoplane 7/4 (1923) and 7/5 (1925) flown but unsold.