Seiko Cal. 6378 - 920

Seiko 6378-920

This Solar model from 1970 features a 45mm Two-Tone case. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-2859592c8ccb]

Also known as: Sumo, UFO

Specifications

Movement
Solar
Case Material
Two-Tone
Case Width
45mm
Case Thickness
10.0mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
120m
Dial Color
Navy
Jewels
36j
Frequency
28,800 bph
Power Reserve
61 hours
Year
1970

Related Models

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