The Martin 167 prototype (NX22076, later 40-706), named XA-22 by the USAAC, first flew in Mar 1939 and was delivered in Sep 1939. It was one of the designs for an attack aircraft that lost out to the Douglas A-20 Havoc. The type was ordered by the French in substantial numbers as the Martin 167F. After the fall of France in June 1940 the aircraft not yet delivered were taken over by the British which used the type as the Martin Maryland Mk I. Apart from that they also ordered an additional 150 as the Maryland Mk.II. All in all 496 aircraft were built. Glenn L.Martin Co. photo