Seiko Cal. 5640 - 775

The Seiko 5640-775 represents an important milestone in Seiko's 1999 lineup. With its 20mm lug width and 13.2mm profile, it sits comfortably on most wrists. [seikata-wm-018d6540570e]

Also known as: Golden Tuna, Emperor

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

13.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

90m

Dial Color

Black

Jewels

34j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1999

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