Seiko Cal. 6639 - 158

This Hand-Winding model from 1997 features a 34mm Hardlex-Coated Steel case. It features a Navy dial protected by a Sapphire crystal and offers 110m of water resistance. [seikata-wm-313b03e70fa6]

Also known as: Monster

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

13.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Navy

Jewels

23j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1997

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