Seiko Cal. 5688 - 388

The Seiko 5688-388 represents an important milestone in Seiko's 1967 lineup. It features a Green dial protected by a Acrylic crystal and offers 90m of water resistance. [seikata-wm-b665e70cf2fb]

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

43mm

Case Thickness

13.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Green

Jewels

30j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1967

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