Seiko Cal. 7131 - 711

The Seiko 7131-711 represents an important milestone in Seiko's 1978 lineup. With its 18mm lug width and 13.0mm profile, it sits comfortably on most wrists. [seikata-wm-452bc8ebc706]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

13.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Black

Jewels

33j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1978

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