Seiko Cal. 6687 - 331

The Seiko 6687-331 represents an important milestone in Seiko's 1994 lineup. Powered by the 6687 caliber with 32j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-08437e008542]

Also known as: Rally, Silverwave

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

10.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

60m

Dial Color

White

Jewels

32j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1994

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