Seiko Cal. 5640 - 153

The Seiko 5640-153 represents an important milestone in Seiko's 1966 lineup. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-2ef0dec4c318]

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

14.6mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1966

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