Seiko Cal. 5278 - 739

Seiko 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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