Seiko Chronograph 6138-7000

Seiko. A stainless steel automatic calendar slide-rule calculator chronograph bracelet watch, Seiko. Chronographe bracelet en acier avec date et règle à calcul mouvement automatique Ref: 6138-7000, Circa 1972

Seiko. A stainless steel automatic calendar slide-rule calculator chronograph bracelet watch, Seiko. Chronographe bracelet en acier avec date et règle à calcul mouvement automatique, Reference: 6138-7000, Date: Circa 1972, Movement: 21-jewel Cal.6138B automatic, Dial: Black, luminous baton hour markers, blue subsidiary dials at 12 and 6 for 12 hour and 30 minute recording, day and date apertures at 3, black tipped white pointed baton hands with luminous inserts, yellow centre chronograph hand, Case: Brushed and polished cushion form, screw down back, bi-directional bezel with black slide-rule calculator insert, No.474246, Strap/Bracelet: Fitted stainless steel link, Buckle/Clasp: Signed folding clasp, Signed: Case, dial & movement, Size: 44mm