Seiko Cal. 6644 - 525

The Seiko 6644-525 represents an important milestone in Seiko's 1990 lineup. Powered by the 6644 caliber with 21j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-8e36328183c6]

Also known as: UFO, Emperor

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

10.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

110m

Dial Color

White

Jewels

21j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1990

Related Models

• Seiko 6627-733
• Seiko 5633-522
• Seiko 7029-493
• Seiko 7077-966
• Seiko 0760-983
• Seiko 5237-144
• Seiko 4481-446
• Seiko 6158-205
• Seiko 5683-491
• Seiko 5620-166
• Seiko 6661-492
• Seiko 7142-370