Seiko Cal. 4491 - 767

The Seiko 4491-767 represents an important milestone in Seiko's 1981 lineup. The Coin-Edge bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-59c677c4490a]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

15.0mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

White

Jewels

28j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1981

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