Seiko Cal. 5640 - 441

The Seiko 5640-441 represents an important milestone in Seiko's 1988 lineup. It features a Black dial protected by a Mineral crystal and offers 200m of water resistance. [seikata-wm-a40d724c953e]

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

35mm

Case Thickness

14.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

200m

Dial Color

Black

Jewels

22j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1988

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