Seiko Cal. 6678 - 420

Seiko 6678-420

This Solar model from 1967 features a 45mm Gold-Plated case. Powered by the 6678 caliber with 25j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-a84b5341b8ff]

Also known as: Monster, Baby Tuna

Specifications

Movement
Solar
Case Material
Gold-Plated
Case Width
45mm
Case Thickness
13.7mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
180m
Dial Color
White
Jewels
25j
Frequency
21,600 bph
Power Reserve
64 hours
Year
1967

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