Seiko Cal. 6687 - 178

The Seiko 6687-178 represents an important milestone in Seiko's 1976 lineup. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 180m of water resistance. [seikata-wm-f65d63db5da6]

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

36mm

Case Thickness

14.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1976

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