Seiko Cal. 6641 - 894

The Seiko 6641-894 represents an important milestone in Seiko's 1979 lineup. The Bidirectional bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-23a05d6847d3]

Also known as: UFO

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

40mm

Case Thickness

12.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Green

Jewels

19j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1979

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