Seiko Cal. 6657 - 788

The Seiko 6657-788 represents an important milestone in Seiko's 1983 lineup. Powered by the 6657 caliber with 19j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-a8bbcfd52cbf]

Also known as: Turtle

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

43mm

Case Thickness

8.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

160m

Dial Color

Cream

Jewels

19j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1983

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