Seiko Cal. 7139 - 279

The Seiko 7139-279 represents an important milestone in Seiko's 1991 lineup. Powered by the 7139 caliber with 31j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-148cc0e77886]

Also known as: Sumo, UFO

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

9.4mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

90m

Dial Color

Silver

Jewels

31j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1991

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