Seiko Cal. 6639 - 891

This Spring Drive model from 1998 features a 36mm Titanium case. It features a Green dial protected by a Mineral crystal and offers 110m of water resistance. [seikata-wm-6b0fa5b2c510]

Also known as: Monster, Flighty

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

36mm

Case Thickness

12.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Green

Jewels

31j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1998

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