Rare vintage Ollech & Wajs Aviation Chronograph instructions manual. Also suitable for the Breitling 806, 809, 8806, 8809, 1806 and 1809. Perfect for collectors or anyone restoring an O&W / Breitling Aviation chronograph. This original booklet provides detailed instructions for using the slide rule and chronograph functions, including calculations for speed, distance, and fuel consumption. A must-have for vintage watch enthusiasts!
In mint condition!
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