Seiko Cal. 6635 - 404

The Seiko 6635-404 represents an important milestone in Seiko's 1970 lineup. It features a Black dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-2237f9930e52]

Also known as: Sea Horse

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

40mm

Case Thickness

10.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Black

Jewels

35j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1970

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