Seiko Cal. 5278 - 204

The 5278-204 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5278 caliber with 21j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-12fc8c7ec3de]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

14.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Silver

Jewels

21j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1986

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