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IWC B-Uhr Luftwaffe 1940's Ref. 431 Military Pilot Watch WWII... for $59,995 for sale from a Seller on Chrono24
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A Crash Course In Flieger (Pilot) And B-Uhren (Navigator) Watches Covering Both Historic And Modern Examples (A Pilot's Watch Photofest!) - Quill & Pad
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