Seiko Cal. 5687 - 243

The Seiko 5687-243 represents an important milestone in Seiko's 1966 lineup. With its 20mm lug width and 14.4mm profile, it sits comfortably on most wrists. [seikata-wm-6bde589d9df7]

Also known as: Tuna, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

14.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1966

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