Seiko Cal. 6635 - 666

The Seiko 6635-666 represents an important milestone in Seiko's 1994 lineup. Powered by the 6635 caliber with 17j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-756e6b6c0c6a]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

34mm

Case Thickness

10.6mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Black

Jewels

17j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1994

Related Models

• Seiko 6357-895
• Seiko 5212-631
• Seiko 0740-646
• Seiko 4492-480
• Seiko 7015-422
• Seiko 6268-405
• Seiko 4410-916
• Seiko 4418-765
• Seiko 6333-642
• Seiko 7176-517
• Seiko 4518-944
• Seiko 6311-310