Seiko Cal. 4427 - 703

This Automatic model from 1973 features a 39mm PVD Black case. With its 19mm lug width and 9.9mm profile, it sits comfortably on most wrists. [seikata-wm-6272326ab645]

Also known as: Sumo, UFO

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

39mm

Case Thickness

9.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1973

Related Models

• Seiko 5626-546
• Seiko 7146-577
• Seiko 6650-591
• Seiko 7083-725
• Seiko 5682-257
• Seiko 6644-732
• Seiko 3837-401
• Seiko 4519-261
• Seiko 7040-220
• Seiko 7024-857
• Seiko 5261-595
• Seiko 6678-812