Seiko Cal. 5681 - 731

The Seiko 5681-731 represents an important milestone in Seiko's 1999 lineup. Powered by the 5681 caliber with 34j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-dafcbee38d41]

Also known as: UFO

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

10.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

130m

Dial Color

Green

Jewels

34j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1999

Related Models

• Seiko 6243-692
• Seiko 5619-516
• Seiko 6232-849
• Seiko 6349-326
• Seiko 6161-133
• Seiko 6312-269
• Seiko 4545-153
• Seiko 7139-879
• Seiko 5619-669
• Seiko 4576-502
• Seiko 4452-367
• Seiko 5610-574