Y1B-17A Flying Fortress (Q18113678)
bomber aircraft prototype model by Boeing
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aliases Boeing Y1B-17A
 Pre-production Flying Fortress A
 Y1B17A
 Boeing B-17A
 B-17A
 B17A
 Boeing Y1B-17A Flying Fortress
 Special Purchase Bomber Design 17 Series A
 Flying Fortress A
 Boeing Flying Fortress A
description bomber aircraft prototype model by Boeing