Seiko Cal. 4581 - 731

This Hand-Winding model from 1981 features a 34mm PVD Black case. Powered by the 4581 caliber with 23j jewels beating at 21,600 bph, it delivers a 67 hours power reserve. [seikata-wm-0ad32436a2c0]

Also known as: Monster, World Timer

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

34mm

Case Thickness

8.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Burgundy

Jewels

23j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1981

Related Models

• Seiko 6114-858
• Seiko 6680-232
• Seiko 6695-400
• Seiko 4461-867
• Seiko 5220-297
• Seiko 7078-632
• Seiko 5634-972
• Seiko 4425-986
• Seiko 0765-766
• Seiko 6632-538
• Seiko 4414-752
• Seiko 5239-813