Seiko Cal. 6647 - 677

The Seiko 6647-677 represents an important milestone in Seiko's 1986 lineup. With its 18mm lug width and 12.5mm profile, it sits comfortably on most wrists. [seikata-wm-b5a5cc8d1a82]

Also known as: Bullhead

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

40mm

Case Thickness

12.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Navy

Jewels

19j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1986

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