Seiko Cal. 5278 - 340

The Seiko 5278-340 represents an important milestone in Seiko's 1983 lineup. With its 22mm lug width and 10.5mm profile, it sits comfortably on most wrists. [seikata-wm-a7e160eba327]

Also known as: Tuna, Emperor

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

10.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

White

Jewels

31j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1983

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