Seiko Cal. 6687 - 436

The Seiko 6687-436 represents an important milestone in Seiko's 1982 lineup. Powered by the 6687 caliber with 22j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-a55a02afdc3e]

Also known as: Golden Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

37mm

Case Thickness

14.3mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1982

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