Seiko. A stainless steel automatic calendar chronograph bracelet watch Reference: 6139-6002 Date: Circa 1978 Movement: 17-jewel Cal.6139B automatic Dial: Tropicalised blue, applied hour luminous block markers, silvered outer 1/5th second divisions, further outer minute divisions, day and date apertures at 3, polished baton hands with luminous inserts, red centre chronograph hand Case: Brushed and polished tonneau form, screw down back, fixed bezel with blue and red tachymeter scale, crown flanked by twin buttons Strap/Bracelet: Fitted graduated brushed link Buckle/Clasp: Signed folding clasp Signed: Case, dial & movement Size: 41mm