Seiko Cal. 6634 - 697

The Seiko 6634-697 represents an important milestone in Seiko's 1980 lineup. Powered by the 6634 caliber with 23j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-e02cadbfbc7e]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

41mm

Case Thickness

10.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

200m

Dial Color

Cream

Jewels

23j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1980

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