Seiko Cal. 4421 - 904

The Seiko 4421-904 represents an important milestone in Seiko's 1966 lineup. It features a Champagne dial protected by a Hardlex crystal and offers 80m of water resistance. [seikata-wm-419aa9ad4514]

Also known as: Helmet, World Timer

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

35mm

Case Thickness

15.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Champagne

Jewels

30j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1966

Related Models

• Seiko 7015-829
• Seiko 7190-807
• Seiko 6192-161
• Seiko 6225-305
• Seiko 7134-392
• Seiko 6163-946
• Seiko 7087-396
• Seiko 3826-817
• Seiko 6326-826
• Seiko 6141-144
• Seiko 5610-492
• Seiko 7158-466