Seiko Cal. 6681 - 663

The Seiko 6681-663 represents an important milestone in Seiko's 1986 lineup. Powered by the 6681 caliber with 25j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-b709f80e6bb9]

Also known as: World Timer, Crown

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

44mm

Case Thickness

8.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Black

Jewels

25j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1986

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