Seiko Cal. 5640 - 575

The Seiko 5640-575 represents an important milestone in Seiko's 1971 lineup. It features a Black dial protected by a Acrylic crystal and offers 150m of water resistance. [seikata-wm-6887fc9267b1]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

10.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Black

Jewels

28j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1971

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