After delays to the planning because of wartime conditions, work proceeded quickly at Toulouse, Marseilles and Paris, where various components were being built and tested. The Armagnac was designed from the outset in a Cook-Craigie production line prior to the first prototype which flew on 2 April 1949 with Sud-Est Chief Pilot Pierre Nadot at the controls but was lost on 30 January 1950 while still undergoing tests. The first production series aircraft F-BAVD flew on 30 December 1950. Examples of the S.E.2010 were demonstrated at the 1951 and 1953 Paris "Grand Palais".