Seiko Cal. 6641 - 856

The Seiko 6641-856 represents an important milestone in Seiko's 1969 lineup. The Bidirectional bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-48d8dfa77167]

Also known as: Sportsmatic

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

14.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

110m

Dial Color

White

Jewels

32j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1969

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