Seiko Cal. 4420 - 332

This Spring Drive model from 1976 features a 34mm Titanium case. With its 18mm lug width and 11.8mm profile, it sits comfortably on most wrists. [seikata-wm-fc05780b748d]

Also known as: Sumo, Silverwave

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

11.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

White

Jewels

25j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1976

Related Models

• Seiko 6639-341
• Seiko 6668-116
• Seiko 5648-881
• Seiko 4486-539
• Seiko 5638-787
• Seiko 3821-923
• Seiko 4493-372
• Seiko 4580-419
• Seiko 0731-887
• Seiko 6240-293
• Seiko 4478-971
• Seiko 6261-929