Seiko Cal. 5640 - 518

The Seiko 5640-518 represents an important milestone in Seiko's 1991 lineup. It features a Cream dial protected by a Acrylic crystal and offers 40m of water resistance. [seikata-wm-6417bd63f36a]

Also known as: Sea Horse, Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

11.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

40m

Dial Color

Cream

Jewels

31j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1991

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