Seiko Cal. 3820 - 825

The Seiko 3820-825 represents an important milestone in Seiko's 1985 lineup. Powered by the 3820 caliber with 30j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-dbe34c4ac4c5]

Also known as: Helmet, Silverwave

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Green

Jewels

30j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1985

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