Seiko Cal. 5688 - 912

The Seiko 5688-912 represents an important milestone in Seiko's 1971 lineup. It features a Silver dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-36896deba227]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

13.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Silver

Jewels

28j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1971

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