Seiko Cal. 5687 - 203

This Quartz model from 1981 features a 37mm Hardlex-Coated Steel case. It features a Navy dial protected by a Hardlex crystal and offers 110m of water resistance. [seikata-wm-d46922ee9dd4]

Also known as: Tuna, Pogue

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

15.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

110m

Dial Color

Navy

Jewels

22j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1981

Related Models

• Seiko 4526-340
• Seiko 4410-200
• Seiko 7099-944
• Seiko 7172-576
• Seiko 6641-595
• Seiko 4526-513
• Seiko 6314-422
• Seiko 7019-310
• Seiko 7152-939
• Seiko 7119-951
• Seiko 7093-447
• Seiko 0728-781