Seiko Cal. 5640 - 435

The Seiko 5640-435 represents an important milestone in Seiko's 1998 lineup. The Bidirectional bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-e26409e91a5f]

Also known as: Baby Tuna

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

45mm

Case Thickness

15.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Navy

Jewels

33j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1998

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