Seiko Cal. 5688 - 431

The Seiko 5688-431 represents an important milestone in Seiko's 1974 lineup. With its 22mm lug width and 15.1mm profile, it sits comfortably on most wrists. [seikata-wm-9e2749467b54]

Also known as: Monster, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

15.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Burgundy

Jewels

26j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1974

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