Seiko Cal. 5633 - 936

The Seiko 5633-936 represents an important milestone in Seiko's 1976 lineup. The Bidirectional bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-0b44a179884f]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

43mm

Case Thickness

12.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Green

Jewels

17j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1976

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