Seiko Cal. 6643 - 151

The Seiko 6643-151 represents an important milestone in Seiko's 1997 lineup. The Coin-Edge bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-65f2ff3f3c46]

Also known as: UFO, World Timer

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

45mm

Case Thickness

8.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Green

Jewels

21j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1997

Related Models

• Seiko 4511-884
• Seiko 4554-882
• Seiko 4566-444
• Seiko 6353-611
• Seiko 6342-392
• Seiko 6116-191
• Seiko 6237-173
• Seiko 6280-307
• Seiko 6698-428
• Seiko 6165-354
• Seiko 4441-718
• Seiko 6323-357