Seiko Cal. 6639 - 601

The Seiko 6639-601 represents an important milestone in Seiko's 1979 lineup. Powered by the 6639 caliber with 18j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-afe76128a526]

Also known as: World Timer

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

42mm

Case Thickness

14.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Navy

Jewels

18j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1979

Related Models

• Seiko 4475-571
• Seiko 5242-124
• Seiko 6362-541
• Seiko 6658-644
• Seiko 0794-466
• Seiko 6634-156
• Seiko 0795-648
• Seiko 6291-948
• Seiko 5697-670
• Seiko 7061-309
• Seiko 6315-555
• Seiko 6265-503