Seiko Cal. 6634 - 677

The Seiko 6634-677 represents an important milestone in Seiko's 1987 lineup. The Coin-Edge bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-f50dc348aa9e]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

8.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

White

Jewels

34j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1987

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