Seiko Cal. 6657 - 720

Seiko 6657-720

This Hand-Winding model from 1990 features a 41mm Titanium case. Powered by the 6657 caliber with 27j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-19b1f5b56479]

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
41mm
Case Thickness
14.1mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
100m
Dial Color
White
Jewels
27j
Frequency
21,600 bph
Power Reserve
70 hours
Year
1990

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seikata-wm-19b1f5b56479