| Role | Heavy bomber |
|---|---|
| National origin | United States |
| Manufacturer | Boeing |
| First flight | 28 July 1935 |
| Introduction | April 1938 |
| Retired | 1968 (Brazilian Air Force) |
| Produced | 1936–1945 |
| Number built | 12,731 |
| Unit cost |
US$238,329 (1945)
US$2,581,000 (2016) |
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