Seiko Cal. 6657 - 341

Seiko 6657-341

This Hand-Winding model from 1981 features a 38mm Two-Tone case. Powered by the 6657 caliber with 17j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-8dfec7d13ec9]

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
38mm
Case Thickness
10.2mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
140m
Dial Color
Green
Jewels
17j
Frequency
28,800 bph
Power Reserve
61 hours
Year
1981

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