Seiko Cal. 3811 - 109

The 3811-109 is a sought-after Spring Drive piece from Seiko's golden era. With its 18mm lug width and 10.6mm profile, it sits comfortably on most wrists. [seikata-wm-dc10cda8a7b4]

Also known as: Sumo, Rally

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

10.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1972

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