Seiko Cal. 3820 - 842

This Spring Drive model from 1981 features a 40mm PVD Black case. Powered by the 3820 caliber with 22j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-7f24a162e362]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Navy

Jewels

22j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1981

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