Seiko Cal. 3881 - 640

This Kinetic model from 1981 features a 36mm PVD Black case. With its 20mm lug width and 15.2mm profile, it sits comfortably on most wrists. [seikata-wm-17599ac932dd]

Also known as: Sumo, Shogun

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

36mm

Case Thickness

15.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Burgundy

Jewels

18j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1981

Related Models

• Seiko 5623-940
• Seiko 3829-132
• Seiko 6642-172
• Seiko 5621-343
• Seiko 4593-803
• Seiko 6328-218
• Seiko 3870-933
• Seiko 5215-669
• Seiko 3850-534
• Seiko 6297-258
• Seiko 7018-933
• Seiko 7068-272