Seiko Cal. 7186 - 931

This Hand-Winding model from 1981 features a 36mm PVD Black case. Powered by the 7186 caliber with 22j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-3ad0372bc112]

Also known as: Bullhead, Navigator

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

36mm

Case Thickness

10.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1981

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