Seiko Cal. 5631 - 844

The Seiko 5631-844 represents an important milestone in Seiko's 1983 lineup. It features a Navy dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-419f57a5661a]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

10.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

90m

Dial Color

Navy

Jewels

34j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1983

Related Models

• Seiko 4421-118
• Seiko 7125-886
• Seiko 4486-258
• Seiko 5685-502
• Seiko 6180-646
• Seiko 6610-798
• Seiko 5229-456
• Seiko 4586-424
• Seiko 6264-635
• Seiko 6282-797
• Seiko 6638-556
• Seiko 6142-314