Seiko Cal. 6687 - 931

The Seiko 6687-931 represents an important milestone in Seiko's 1999 lineup. It features a Green dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-a579530ff9cc]

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

45mm

Case Thickness

11.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Green

Jewels

24j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1999

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