Seiko Cal. 5691 - 450

Released in 1979, the Cal. 5691 with design code 450 was part of Seiko's domestic market collection. The Bidirectional bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-bcb769afbc0d]

Also known as: Sumo, UFO

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

36mm

Case Thickness

11.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Silver

Jewels

34j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1979

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