Seiko Cal. 5278 - 263

The Seiko 5278-263 represents an important milestone in Seiko's 1971 lineup. Powered by the 5278 caliber with 19j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-9d4f6b6f2796]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

14.5mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Cream

Jewels

19j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1971

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