Seiko Cal. 5278 - 727

The Seiko 5278-727 represents an important milestone in Seiko's 1973 lineup. Powered by the 5278 caliber with 27j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-dc73374097dd]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

13.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1973

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