Seiko Cal. 4431 - 612

The Seiko 4431-612 represents an important milestone in Seiko's 1980 lineup. With its 22mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-3cbc17ee4f67]

Also known as: Tuna, Bullhead

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

10.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

White

Jewels

22j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1980

Related Models

• Seiko 5686-102
• Seiko 0765-782
• Seiko 5281-857
• Seiko 0725-504
• Seiko 7011-492
• Seiko 7125-522
• Seiko 3820-814
• Seiko 4424-538
• Seiko 7148-313
• Seiko 7081-871
• Seiko 6664-517
• Seiko 6273-330