1. Plane of unussual design.
 2. Crew of more than One
 
 3. Origianally the plane was considered second best in a design runoff.
 
 4. The first flight of its first and uncompleted prototype was in 1937 nearly 1 year ahead of its rival.
 
 5. In total more than 1,000 and less than 1,500 were built.
 
 
  
          
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