Seiko Cal. 5640 - 594

The Seiko 5640-594 represents an important milestone in Seiko's 1984 lineup. It features a White dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-4eeb8d68721d]

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

34mm

Case Thickness

15.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

160m

Dial Color

White

Jewels

20j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1984

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