Seiko Cal. 6691 - 670

This Spring Drive model from 1998 features a 36mm Stainless Steel case. Powered by the 6691 caliber with 18j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-e93a0ba39333]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

8.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Green

Jewels

18j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1998

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