Seiko Cal. 6658 - 712

This Spring Drive model from 1992 features a 40mm PVD Black case. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 90m of water resistance. [seikata-wm-a8e2ce913aa1]

Also known as: Bullhead, World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

8.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1992

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