Seiko Cal. 3840 - 821

The Seiko 3840-821 represents an important milestone in Seiko's 1979 lineup. With its 18mm lug width and 11.3mm profile, it sits comfortably on most wrists. [seikata-wm-1dc55daf6904]

Also known as: Crown

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

45mm

Case Thickness

11.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

50m

Dial Color

Green

Jewels

21j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1979

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