Seiko Cal. 5638 - 396

The Seiko 5638-396 represents an important milestone in Seiko's 1987 lineup. The Coin-Edge bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-10a3ab1f686b]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

10.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Navy

Jewels

35j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1987

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