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Keystone B-6A
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Description
  Manufacturer: | Keystone |
  Base model: | B-6 |
  Designation: | B-6 |
  Version: | A |
  Designation System: | U.S. Air Force |
  Designation Period: | 1924-Present |
  Basic role: | Bomber |
Specifications
Known serial numbers
 
 
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