Seiko Cal. 5687 - 371

The Seiko 5687-371 represents an important milestone in Seiko's 1995 lineup. With its 18mm lug width and 14.3mm profile, it sits comfortably on most wrists. [seikata-wm-f9ff480c653e]

Also known as: Helmet, Rally

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

14.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Silver

Jewels

27j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1995

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