Seiko Cal. 6642 - 678

The Seiko 6642-678 represents an important milestone in Seiko's 1998 lineup. Powered by the 6642 caliber with 31j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-2bcf6192b4b3]

Also known as: Bullhead

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

11.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Cream

Jewels

31j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1998

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