Seiko Cal. 7055 - 904

The Seiko 7055-904 represents an important milestone in Seiko's 1989 lineup. Powered by the 7055 caliber with 27j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-0a13f78757a8]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

14.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Black

Jewels

27j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1989

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