Seiko Cal. 5687 - 603

The Seiko 5687-603 represents an important milestone in Seiko's 1971 lineup. It features a Champagne dial protected by a Hardlex crystal and offers 160m of water resistance. [seikata-wm-57a0de3c901d]

Also known as: Helmet, Emperor

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

13.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

160m

Dial Color

Champagne

Jewels

35j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1971

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