Seiko Cal. 5278 - 150

The 5278-150 is a sought-after Spring Drive piece from Seiko's golden era. With its 20mm lug width and 9.1mm profile, it sits comfortably on most wrists. [seikata-wm-34cc23fd72fd]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

9.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

200m

Dial Color

Green

Jewels

28j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1975

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