Seiko Cal. 0731 - 186

The Seiko 0731-186 represents an important milestone in Seiko's 1980 lineup. Powered by the 0731 caliber with 19j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-873fae69e6a8]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

15.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Champagne

Jewels

19j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1980

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