Martin 167 Maryland - version overview
Martin XA-22
prototype for the U.S. Air Force
Martin Model 167F
version built for France, known here as the Glenn Martin 167A-3
Martin Maryland Mk.I
the planes that the French couldn't take over were taken by the British and modified to suit their needs (weapons, radio equipment, etc.)
Martin Maryland Mk.II
British-built version
Sources:
http://en.wikipedia.org/wiki/A-22_Maryland
Martin XA-22
prototype for the U.S. Air Force
Martin Model 167F
version built for France, known here as the Glenn Martin 167A-3
Martin Maryland Mk.I
the planes that the French couldn't take over were taken by the British and modified to suit their needs (weapons, radio equipment, etc.)
Martin Maryland Mk.II
British-built version
Sources:
http://en.wikipedia.org/wiki/A-22_Maryland