Seiko Cal. 4431 - 553

The Seiko 4431-553 represents an important milestone in Seiko's 1966 lineup. It features a White dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-1132011fc8af]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Titanium

Case Width

35mm

Case Thickness

14.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

White

Jewels

35j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1966

Related Models

• Seiko 6343-503
• Seiko 7063-351
• Seiko 6119-105
• Seiko 6694-710
• Seiko 5656-882
• Seiko 4538-406
• Seiko 7023-767
• Seiko 7189-714
• Seiko 6296-175
• Seiko 4483-462
• Seiko 6174-316
• Seiko 7076-253