Seiko Cal. 6657 - 422

The Seiko 6657-422 represents an important milestone in Seiko's 1999 lineup. The Coin-Edge bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-58a4abf7ea02]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

14.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

White

Jewels

29j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1999

Related Models

• Seiko 6172-320
• Seiko 7197-861
• Seiko 4595-247
• Seiko 7181-524
• Seiko 4554-801
• Seiko 5688-298
• Seiko 6259-218
• Seiko 4564-252
• Seiko 4495-715
• Seiko 4424-483
• Seiko 6157-157
• Seiko 6238-409