Seiko Cal. 4431 - 766

This Spring Drive model from 1975 features a 34mm Two-Tone case. Powered by the 4431 caliber with 32j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-0685c00e05f1]

Also known as: Helmet, Goldfeather

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

8.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Cream

Jewels

32j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1975

Related Models

• Seiko 5227-578
• Seiko 5636-975
• Seiko 7059-485
• Seiko 0791-201
• Seiko 6216-300
• Seiko 3875-241
• Seiko 3835-651
• Seiko 4575-946
• Seiko 7114-693
• Seiko 5655-516
• Seiko 6236-347
• Seiko 7064-358