Seiko Cal. 5643 - 427

The Seiko 5643-427 represents an important milestone in Seiko's 1976 lineup. It features a Silver dial protected by a Hardlex crystal and offers 160m of water resistance. [seikata-wm-5493593f9481]

Also known as: Sportsmatic

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

46mm

Case Thickness

8.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Silver

Jewels

20j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1976

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