Seiko Cal. 6657 - 186

The Seiko 6657-186 represents an important milestone in Seiko's 1991 lineup. Powered by the 6657 caliber with 26j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-698feea7d4a5]

Also known as: Samurai, Sumo

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

36mm

Case Thickness

13.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Navy

Jewels

26j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1991

Related Models

• Seiko 7150-996
• Seiko 3852-818
• Seiko 5267-246
• Seiko 5244-412
• Seiko 6224-798
• Seiko 4456-724
• Seiko 5211-294
• Seiko 4469-128
• Seiko 6236-712
• Seiko 4591-753
• Seiko 6645-387
• Seiko 6311-116