Seiko Cal. 6657 - 306

Seiko 6657-306

This Kinetic model from 1978 features a 40mm PVD Black case. Powered by the 6657 caliber with 20j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-0f6e267404d7]

Specifications

Movement
Kinetic
Case Material
PVD Black
Case Width
40mm
Case Thickness
11.7mm
Lug Width
22mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
110m
Dial Color
Cream
Jewels
20j
Frequency
21,600 bph
Power Reserve
64 hours
Year
1978

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