Seiko Cal. 4431 - 755

This Hand-Winding model from 1991 features a 41mm Titanium case. Powered by the 4431 caliber with 17j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-d2ac21987917]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

15.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

160m

Dial Color

Green

Jewels

17j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1991

Related Models

• Seiko 6366-521
• Seiko 4461-135
• Seiko 6633-455
• Seiko 4484-170
• Seiko 7128-547
• Seiko 7063-342
• Seiko 5641-725
• Seiko 6242-138
• Seiko 6343-324
• Seiko 4572-119
• Seiko 7056-670
• Seiko 0730-545