Seiko Cal. 7178 - 172

The Seiko 7178-172 represents an important milestone in Seiko's 1973 lineup. The Coin-Edge bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-02d60c24c79f]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

9.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Green

Jewels

23j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1973

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