Seiko Cal. 4431 - 851

This Quartz model from 1992 features a 41mm Hardlex-Coated Steel case. It features a Navy dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-21eff9c0321f]

Also known as: Monster

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

13.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Navy

Jewels

30j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1992

Related Models

• Seiko 6676-835
• Seiko 5662-914
• Seiko 4561-805
• Seiko 6357-945
• Seiko 5245-324
• Seiko 5283-850
• Seiko 6258-475
• Seiko 6163-958
• Seiko 6120-459
• Seiko 4476-850
• Seiko 0735-757
• Seiko 6111-143