Koninklijke Maatschappij De Schelde, famed dockyard at Vlissingen (Flushing), took on most staff of Pander & Zonen 1935, including designer T.E. Slot. Produced S.12 4-seat monoplane, Scheldemusch and Scheldemeeuw light pusher biplanes, S.20 4-seat pusher and S.21 pusher fighter (which became so-called 'Focke-Wulf 198').