Seiko Cal. 6687 - 978

The Seiko 6687-978 represents an important milestone in Seiko's 1987 lineup. With its 19mm lug width and 11.2mm profile, it sits comfortably on most wrists. [seikata-wm-55e1f69e577b]

Also known as: Sumo, Flighty

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

11.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Cream

Jewels

24j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1987

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