Seiko Cal. 6670 - 854

The Seiko 6670-854 represents an important milestone in Seiko's 1971 lineup. Powered by the 6670 caliber with 21j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-fd09b6d96578]

Also known as: Bullhead

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

38mm

Case Thickness

8.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

170m

Dial Color

Green

Jewels

21j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1971

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