Seiko Cal. 5271 - 740

Seiko 5271-740

The Seiko 5271-740 represents an important milestone in Seiko's 1984 lineup. Powered by the 5271 caliber with 33j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-ac37b05352c7]

Also known as: Sumo, Helmet

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
40mm
Case Thickness
11.3mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
100m
Dial Color
White
Jewels
33j
Frequency
21,600 bph
Power Reserve
46 hours
Year
1984

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