Seiko Cal. 6639 - 860

The Seiko 6639-860 represents an important milestone in Seiko's 1992 lineup. The Fixed bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-d2380b89f78c]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

12.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1992

Related Models

• Seiko 6623-748
• Seiko 5261-941
• Seiko 4435-630
• Seiko 7036-384
• Seiko 7136-273
• Seiko 6230-348
• Seiko 7148-431
• Seiko 6635-732
• Seiko 5259-285
• Seiko 0784-639
• Seiko 0753-757
• Seiko 6352-937