Seiko Cal. 6391 - 831

This Kinetic model from 1969 features a 44mm Hardlex-Coated Steel case. It features a Cream dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-18a52dc3b4f6]

Also known as: Bullhead

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

11.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

50m

Dial Color

Cream

Jewels

28j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1969

Related Models

• Seiko 6251-991
• Seiko 6263-258
• Seiko 5694-344
• Seiko 5691-832
• Seiko 6212-464
• Seiko 3841-458
• Seiko 4412-583
• Seiko 3816-702
• Seiko 6186-438
• Seiko 6235-958
• Seiko 7074-381
• Seiko 6628-232