Seiko Cal. 5687 - 736

The Seiko 5687-736 represents an important milestone in Seiko's 1971 lineup. With its 22mm lug width and 14.3mm profile, it sits comfortably on most wrists. [seikata-wm-b3cb96a0e28d]

Also known as: Bullhead, Emperor

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

37mm

Case Thickness

14.3mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Silver

Jewels

31j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1971

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