ZENITH Spezial rare big aviation watch, Switzerland around 1938, manual winding, chrome-plated nickel case abraded, on both sides screwed down, fixed bow-shaped lugs, turning bezel with luminous marking, black dial restored, white Arabic numerals, constant second at 6, silvered luminous hands, gold plated movement calibre 12.4 under glass- cuvette, 15 jewels, precision adjustment, diameter approx. 41 mm, condition 2-3