Seiko Cal. 6658 - 998

The Seiko 6658-998 represents an important milestone in Seiko's 1966 lineup. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 150m of water resistance. [seikata-wm-b735d11fb0e4]

Also known as: Bullhead, Navigator

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

14.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1966

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