Seiko Cal. 6645 - 318

The Seiko 6645-318 represents an important milestone in Seiko's 1988 lineup. The Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-72924fb3958e]

Also known as: Bullhead, Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

180m

Dial Color

Champagne

Jewels

25j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1988

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