Seiko Cal. 5641 - 828

The Seiko 5641-828 represents an important milestone in Seiko's 1972 lineup. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-427cb93dae8b]

Also known as: Baby Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

42mm

Case Thickness

14.6mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Navy

Jewels

22j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1972

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