Perhaps the most iconic of all pilot’s watch designs, the Beobachtungs-uhren (“observation watch”) was developed in the late 1930s as an instrument for German bomber crews, who were then preparing for war. A specification was put forth by the Luftfahrtministerium (air ministry) and answered by 5 companies (IWC, A. Lange & Söhne, Wempe, Lacher & Company/Durowe (Laco), and Walter Storz (Stowa), which produced the watches under identical specifications. Two types were specified, the A and B, which had slightly different dial layouts, but each featured a hand-winding movement in an oversized 55mm case that was meant to fit over a flight jacket (or, supposedly, to be strapped to the pilot’s or navigator’s leg for hands-free use).

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