Seiko Cal. 4433 - 731

The 4433-731 is a sought-after Spring Drive piece from Seiko's golden era. It features a White dial protected by a Sapphire crystal and offers 170m of water resistance. [seikata-wm-45a2409702aa]

Also known as: Sumo, Silverwave

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

13.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

170m

Dial Color

White

Jewels

36j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1981

Related Models

• Seiko 6164-288
• Seiko 6314-341
• Seiko 7122-771
• Seiko 7098-561
• Seiko 7157-309
• Seiko 4475-597
• Seiko 6258-774
• Seiko 3836-198
• Seiko 5292-488
• Seiko 3880-627
• Seiko 6151-315
• Seiko 6684-542