Seiko Cal. 5640 - 714

The Seiko 5640-714 represents an important milestone in Seiko's 1975 lineup. The Fixed bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-6580f9d7a920]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

10.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

Cream

Jewels

32j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1975

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