Seiko Cal. 5687 - 311

The 5687-311 is a sought-after Quartz piece from Seiko's golden era. It features a Green dial protected by a Acrylic crystal and offers 200m of water resistance. [seikata-wm-93a4003afd86]

Also known as: Navigator

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

37mm

Case Thickness

15.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Green

Jewels

20j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1989

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