Seiko Cal. 4431 - 606

The 4431-606 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4431 caliber with 36j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-53e0a92c5c6b]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

43mm

Case Thickness

8.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

80m

Dial Color

Burgundy

Jewels

36j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1966

Related Models

• Seiko 4426-398
• Seiko 5686-502
• Seiko 4540-903
• Seiko 7135-547
• Seiko 7149-346
• Seiko 0734-435
• Seiko 4430-177
• Seiko 4433-394
• Seiko 6246-778
• Seiko 5625-126
• Seiko 7123-144
• Seiko 6192-473