BREITLING Navitimer aviation chronograph reference 806 in steel, Switzerland around 1964, manual winding, pressed down case, bidirectional revolving slide rule-bezel, original pusher and winding crown, black shiny-dial patinated/spotty, original hands, pink gilded movement calibre Venus 178, 17 jewels, Glucydur-balance with Breguet- hairspring, diameter approx. 41 mm, overhaul recommended at buyer's expense, condition 2-3
