Seiko Cal. 5687 - 728

This Spring Drive model from 1981 features a 40mm Stainless Steel case. It features a Green dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-64240141cba1]

Also known as: Turtle

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

15.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Green

Jewels

19j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1981

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