Seiko Cal. 7131 - 357

The Seiko 7131-357 represents an important milestone in Seiko's 1971 lineup. With its 18mm lug width and 9.2mm profile, it sits comfortably on most wrists. [seikata-wm-f88a93b5a29a]

Also known as: Helmet, Flighty

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

43mm

Case Thickness

9.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Green

Jewels

24j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1971

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