Seiko Cal. 5278 - 739

The Seiko 5278-739 represents an important milestone in Seiko's 1973 lineup. Powered by the 5278 caliber with 23j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-7f8d3c337118]

Also known as: Sumo, UFO

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

46mm

Case Thickness

10.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Green

Jewels

23j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1973

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