Seiko Cal. 5631 - 789

The Seiko 5631-789 represents an important milestone in Seiko's 1981 lineup. It features a Navy dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-c147e509e981]

Also known as: Crown

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

11.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Navy

Jewels

19j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1981

Related Models

• Seiko 3867-552
• Seiko 6212-413
• Seiko 4445-936
• Seiko 5283-723
• Seiko 6236-825
• Seiko 5639-731
• Seiko 6138-568
• Seiko 5654-691
• Seiko 6319-507
• Seiko 7025-530
• Seiko 6231-861
• Seiko 5224-620