Seiko Cal. 6657 - 904

The Seiko 6657-904 represents an important milestone in Seiko's 1995 lineup. The Inner Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-e03137fde251]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

15.1mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Cream

Jewels

32j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1995

Related Models

• Seiko 6273-982
• Seiko 5249-159
• Seiko 4485-496
• Seiko 5693-240
• Seiko 5252-217
• Seiko 5653-756
• Seiko 6293-785
• Seiko 6323-804
• Seiko 4542-766
• Seiko 0796-515
• Seiko 4479-406
• Seiko 6327-763