Seiko Cal. 5668 - 257

The Seiko 5668-257 represents an important milestone in Seiko's 1968 lineup. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-f896776641ef]

Also known as: Sumo, Emperor

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1968

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