Seiko Cal. 5688 - 366

The Seiko 5688-366 represents an important milestone in Seiko's 1971 lineup. With its 18mm lug width and 9.5mm profile, it sits comfortably on most wrists. [seikata-wm-9a6b7f061594]

Also known as: Sea Horse, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

9.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

170m

Dial Color

Champagne

Jewels

32j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1971

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