Seiko Cal. 4420 - 643

The 4420-643 is a sought-after Automatic piece from Seiko's golden era. With its 21mm lug width and 11.6mm profile, it sits comfortably on most wrists. [seikata-wm-f3f0c4957923]

Also known as: Helmet, Emperor

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

11.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

90m

Dial Color

Silver

Jewels

19j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1970

Related Models

• Seiko 6242-704
• Seiko 4485-973
• Seiko 6359-173
• Seiko 4488-291
• Seiko 6337-815
• Seiko 5295-615
• Seiko 4420-901
• Seiko 6384-733
• Seiko 5619-612
• Seiko 6347-935
• Seiko 5623-621
• Seiko 0758-572