Seiko Cal. 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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