HANHART Flyback German military aviation- chronograph type 417, Germany around 1960, manual winding, chrome-plated case stock- number 12-121-5208, fluted turning bezel, snap on stainless steel case-back with military engraving, black dial with Arabic luminous numerals, silvered luminous hands, nickel plated movement calibre 15 with intermediate wheel, 17 jewels, screw balance with Breguet-hairspring, diameter approx. 40 mm, overhaul recommended at buyer's expense, condition 3