Seiko Cal. 7131 - 840

The 7131-840 is a sought-after Automatic piece from Seiko's golden era. With its 18mm lug width and 11.8mm profile, it sits comfortably on most wrists. [seikata-wm-a9386825d8f1]

Also known as: UFO, Bellmatic

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

11.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1983

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