Seiko Cal. 5638 - 538

The Seiko 5638-538 represents an important milestone in Seiko's 1987 lineup. It features a Navy dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-2a3363d2d4b0]

Also known as: Tuna, Pogue

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

39mm

Case Thickness

14.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

17j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1987

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