Seiko Cal. 7091 - 717

The Seiko 7091-717 represents an important milestone in Seiko's 1970 lineup. It features a Black dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-0923621e60e8]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

14.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

Black

Jewels

17j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1970

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