Seiko Cal. 7178 - 556

The Seiko 7178-556 represents an important milestone in Seiko's 1973 lineup. It features a Blue Sunburst dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-af4b408d5f72]

Also known as: Sumo, Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

10.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1973

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