Seiko Cal. 4431 - 413

The 4431-413 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4431 caliber with 21j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-61c62e8ae50e]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

35mm

Case Thickness

15.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Champagne

Jewels

21j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1968

Related Models

• Seiko 6180-144
• Seiko 5691-827
• Seiko 5254-593
• Seiko 4546-409
• Seiko 5260-346
• Seiko 3887-996
• Seiko 6647-855
• Seiko 4584-124
• Seiko 6667-841
• Seiko 6357-500
• Seiko 5290-959
• Seiko 6694-518