Seiko Cal. 3820 - 311

Released in 1987, the Cal. 3820 with design code 311 was part of Seiko's domestic market collection. With its 18mm lug width and 15.5mm profile, it sits comfortably on most wrists. [seikata-wm-660bf325af9c]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

15.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Green

Jewels

36j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1987

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