Seiko Cal. 5641 - 978

The Seiko 5641-978 represents an important milestone in Seiko's 1986 lineup. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-eddbb923ae79]

Also known as: World Timer, Golden Tuna

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

40mm

Case Thickness

14.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Burgundy

Jewels

26j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1986

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