Seiko Cal. 5690 - 633

The Seiko 5690-633 represents an important milestone in Seiko's 1980 lineup. Powered by the 5690 caliber with 30j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-f5fbc480f7c2]

Also known as: Turtle, Baby Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

36mm

Case Thickness

15.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

White

Jewels

30j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1980

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