Seiko Cal. 6670 - 731

The Seiko 6670-731 represents an important milestone in Seiko's 1987 lineup. Powered by the 6670 caliber with 36j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-45a1edc53125]

Also known as: World Timer, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

9.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

70m

Dial Color

Navy

Jewels

36j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1987

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