Seiko Cal. 6618 - 634

The Seiko 6618-634 represents an important milestone in Seiko's 1979 lineup. Powered by the 6618 caliber with 17j jewels beating at 21,600 bph, it delivers a 58 hours power reserve. [seikata-wm-5f5dd4ec04b5]

Also known as: Bullhead, Sea Horse

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

15.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

50m

Dial Color

Navy

Jewels

17j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1979

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