Seiko Cal. 5633 - 104

The Seiko 5633-104 represents an important milestone in Seiko's 1971 lineup. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-559328b30351]

Also known as: Sea Horse, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

12.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Navy

Jewels

21j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1971

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