Seiko Cal. 5634 - 639

The Seiko 5634-639 represents an important milestone in Seiko's 1989 lineup. It features a Green dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-1f5f574e7ca1]

Also known as: Samurai, Sumo

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

11.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Green

Jewels

27j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1989

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