Seiko Cal. 5640 - 371

This Kinetic model from 1981 features a 38mm Stainless Steel case. With its 22mm lug width and 12.3mm profile, it sits comfortably on most wrists. [seikata-wm-a2664c90c362]

Also known as: Bullhead

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

12.3mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Burgundy

Jewels

33j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1981

Related Models

• Seiko 0789-727
• Seiko 4544-223
• Seiko 7167-558
• Seiko 6655-246
• Seiko 4594-752
• Seiko 6179-137
• Seiko 3820-418
• Seiko 6651-467
• Seiko 5276-617
• Seiko 5296-657
• Seiko 5661-675
• Seiko 7038-971