Seiko. A stainless steel automatic calendar chronograph bracelet watch

Ref: 6139-6002, Circa 1978
Seiko. A stainless steel automatic calendar chronograph bracelet watch
Reference: 6139-6002
Date: Circa 1978
Movement: 17-jewel Cal.6139B automatic
Dial: Sunburst yellow, applied hour luminous block markers, black outer 1/5th second divisions, further outer minute divisions on white ground, 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 pushers
Strap/Bracelet: Fitted graduated brushed link
Buckle/Clasp: Signed folding clasp
Signed: Case, dial & movement
Size: 41mm