Seiko Cal. 7027 - 790

The Seiko 7027-790 represents an important milestone in Seiko's 1977 lineup. Powered by the 7027 caliber with 23j jewels beating at 36,000 bph, it delivers a 58 hours power reserve. [seikata-wm-62054d8209a6]

Also known as: Sumo, Helmet

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

13.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Green

Jewels

23j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1977

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