Seiko Cal. 6657 - 857

The Seiko 6657-857 represents an important milestone in Seiko's 1967 lineup. Powered by the 6657 caliber with 23j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-8d4bdebcf055]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

8.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Cream

Jewels

23j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1967

Related Models

• Seiko 0738-644
• Seiko 6253-302
• Seiko 6653-426
• Seiko 7115-419
• Seiko 7069-839
• Seiko 5296-101
• Seiko 4559-807
• Seiko 6144-660
• Seiko 3884-235
• Seiko 0741-423
• Seiko 6676-830
• Seiko 6285-657