Seiko Cal. 5638 - 964

The Seiko 5638-964 represents an important milestone in Seiko's 1982 lineup. It features a Black dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-532644b3d419]

Also known as: Samurai, Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

11.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Black

Jewels

26j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1982

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