Seiko Cal. 7188 - 657

This Spring Drive model from 1981 features a 44mm Hardlex-Coated Steel case. It features a White dial protected by a Hardlex crystal and offers 150m of water resistance. [seikata-wm-a15011666a4a]

Also known as: World Timer, Crown

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

14.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

White

Jewels

29j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1981

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