Seiko Cal. 6657 - 389

Seiko 6657-389

The 6657-389 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6657 caliber with 35j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-37211583daf5]

Also known as: Turtle, Sportsmatic

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
35mm
Case Thickness
12.4mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
200m
Dial Color
Silver
Jewels
35j
Frequency
21,600 bph
Power Reserve
64 hours
Year
1975

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seikata-wm-37211583daf5