Seiko Cal. 6657 - 448

The Seiko 6657-448 represents an important milestone in Seiko's 1998 lineup. Powered by the 6657 caliber with 17j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-e318e3c9e231]

Also known as: Helmet, Emperor

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

12.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

90m

Dial Color

Navy

Jewels

17j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1998

Related Models

• Seiko 3881-540
• Seiko 6126-169
• Seiko 7016-153
• Seiko 5247-584
• Seiko 3871-389
• Seiko 6121-507
• Seiko 5668-389
• Seiko 5272-885
• Seiko 6672-836
• Seiko 3853-310
• Seiko 4455-593
• Seiko 7096-224