Seiko Cal. 5691 - 936

The Seiko 5691-936 represents an important milestone in Seiko's 1999 lineup. The Bidirectional bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-bc6bc4c64670]

Also known as: Sumo, UFO

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

9.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Black

Jewels

31j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1999

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