Seiko Cal. 5643 - 416

The Seiko 5643-416 represents an important milestone in Seiko's 1975 lineup. The Fixed bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-851c4abc256c]

Also known as: Crown, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

13.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1975

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