Seiko Cal. 6378 - 420

Seiko 6378-420

The 6378-420 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6378 caliber with 28j jewels beating at 21,600 bph, it delivers a 58 hours power reserve. [seikata-wm-7345f21b6488]

Also known as: UFO, Baby Tuna

Specifications

Movement
Kinetic
Case Material
Titanium
Case Width
46mm
Case Thickness
12.8mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
80m
Dial Color
White
Jewels
28j
Frequency
21,600 bph
Power Reserve
58 hours
Year
1987

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