Seiko Cal. 5641 - 664

The Seiko 5641-664 represents an important milestone in Seiko's 1967 lineup. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-9645bd50ba88]

Also known as: Emperor

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

40mm

Case Thickness

11.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

50m

Dial Color

Green

Jewels

27j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1967

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