Seiko Cal. 6638 - 506

This Kinetic model from 1968 features a 37mm PVD Black case. With its 20mm lug width and 14.5mm profile, it sits comfortably on most wrists. [seikata-wm-0e766d472761]

Also known as: UFO, Golden Tuna

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

37mm

Case Thickness

14.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Champagne

Jewels

24j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1968

Related Models

• Seiko 5647-802
• Seiko 7113-475
• Seiko 5281-228
• Seiko 4486-820
• Seiko 3848-566
• Seiko 6212-297
• Seiko 4475-397
• Seiko 0772-377
• Seiko 7153-999
• Seiko 6176-620
• Seiko 5276-324
• Seiko 0780-724