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Description
| Manufacturer: | Keystone | |
| Base model: | B-6 | |
| Designation: | Y1B-6 | |
| Designation System: | U.S. Air Force | |
| Designation Period: | 1924-Present | |
| Basic role: | Bomber | |
| Status: | Prototype | |
Specifications
| Not Yet Available |
Known serial numbers
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Description
Specifications
Known serial numbers | ||||||||||||||||||||||||||||
