Seiko Cal. 4431 - 715

The 4431-715 is a sought-after Spring Drive piece from Seiko's golden era. It features a Navy dial protected by a Acrylic crystal and offers 30m of water resistance. [seikata-wm-c65a8e9d89e1]

Also known as: Bellmatic, World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

9.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

22j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1972

Related Models

• Seiko 4473-596
• Seiko 4522-463
• Seiko 3883-908
• Seiko 6325-226
• Seiko 5647-270
• Seiko 6682-546
• Seiko 6665-408
• Seiko 7040-601
• Seiko 6396-543
• Seiko 7072-964
• Seiko 6180-282
• Seiko 6316-698