Seiko Cal. 5639 - 711

The Seiko 5639-711 represents an important milestone in Seiko's 1989 lineup. It features a Green dial protected by a Hardlex crystal and offers 60m of water resistance. [seikata-wm-4ae8ab9f1706]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

8.9mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Green

Jewels

26j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1989

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