Seiko Cal. 4431 - 635

This Kinetic model from 1988 features a 45mm Two-Tone case. It features a Silver dial protected by a Hardlex crystal and offers 60m of water resistance. [seikata-wm-2c005b361f53]

Also known as: UFO, Flighty

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

45mm

Case Thickness

9.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

60m

Dial Color

Silver

Jewels

17j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1988

Related Models

• Seiko 5215-900
• Seiko 3897-289
• Seiko 0741-679
• Seiko 5678-718
• Seiko 4431-735
• Seiko 0795-619
• Seiko 6241-519
• Seiko 7142-651
• Seiko 6123-534
• Seiko 5664-747
• Seiko 5213-671
• Seiko 4543-695