Seiko Cal. 4420 - 435

This Quartz model from 1979 features a 41mm Stainless Steel case. With its 20mm lug width and 11.4mm profile, it sits comfortably on most wrists. [seikata-wm-471c30ed6c04]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

11.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

Silver

Jewels

26j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1979

Related Models

• Seiko 5299-635
• Seiko 4432-352
• Seiko 3895-779
• Seiko 4532-254
• Seiko 4554-489
• Seiko 6157-508
• Seiko 6660-306
• Seiko 4451-473
• Seiko 6370-375
• Seiko 7159-533
• Seiko 4556-480
• Seiko 6194-815