Seiko Cal. 6657 - 788

Seiko 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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