Seiko Cal. 6631 - 143

This Hand-Winding model from 1997 features a 37mm Titanium case. It features a Green dial protected by a Hardlex crystal and offers 30m of water resistance. [seikata-wm-324430fc5d0e]

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

37mm

Case Thickness

11.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Green

Jewels

18j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1997

Related Models

• Seiko 3847-178
• Seiko 4533-582
• Seiko 6647-587
• Seiko 6243-829
• Seiko 5698-118
• Seiko 7178-245
• Seiko 6653-542
• Seiko 6254-471
• Seiko 7120-956
• Seiko 7037-417
• Seiko 7046-841
• Seiko 0790-268