Seiko Cal. 5640 - 701

This Quartz model from 1981 features a 37mm Hardlex-Coated Steel case. It features a Green dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-43dc11a25bb1]

Also known as: Monster

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

160m

Dial Color

Green

Jewels

28j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1981

Related Models

• Seiko 3843-842
• Seiko 6160-645
• Seiko 0733-571
• Seiko 5642-852
• Seiko 6239-294
• Seiko 5630-172
• Seiko 6274-402
• Seiko 7056-709
• Seiko 6688-232
• Seiko 6344-342
• Seiko 5693-616
• Seiko 6170-920