Seiko Cal. 5681 - 693

This Automatic model from 1979 features a 37mm Hardlex-Coated Steel case. It features a Blue Sunburst dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-2a8e8b34df8d]

Also known as: Emperor

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

15.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1979

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