Seiko Cal. 5643 - 301

The Seiko 5643-301 represents an important milestone in Seiko's 1978 lineup. It features a Silver dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-89d00b94b4c2]

Also known as: Navigator

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

15.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

110m

Dial Color

Silver

Jewels

31j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1978

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