Seiko Cal. 6643 - 425

This Spring Drive model from 1998 features a 35mm Titanium case. It features a Navy dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-40328d51bd8d]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

140m

Dial Color

Navy

Jewels

17j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1998

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