SEIKO rare flyback-chronograph with hour- & minute counter at 6, Japan around 1975, self winding, steel-monocoque case reference 7016- 500, gray dial with raised hour-indices, silvered hands, day & date, calibre 7016A, 17 jewels, measures approx. 41 x 36 mm, overhaul recommended at buyer's expense, condition 2-3