Seiko Cal. 6378 - 257

Seiko 6378-257

This Hand-Winding model from 1974 features a 41mm Gold-Plated case. Powered by the 6378 caliber with 18j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-6edfe2974d81]

Specifications

Movement
Hand-Winding
Case Material
Gold-Plated
Case Width
41mm
Case Thickness
14.2mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
160m
Dial Color
Green
Jewels
18j
Frequency
21,600 bph
Power Reserve
70 hours
Year
1974

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seikata-wm-6edfe2974d81