Seiko Cal. 5641 - 764

The Seiko 5641-764 represents an important milestone in Seiko's 1984 lineup. Powered by the 5641 caliber with 21j jewels beating at 28,800 bph, it delivers a 62 hours power reserve. [seikata-wm-ffdb72485321]

Also known as: Bellmatic, Sea Horse

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

44mm

Case Thickness

14.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

White

Jewels

21j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1984

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