Seiko Cal. 3821 - 284

The Seiko 3821-284 represents an important milestone in Seiko's 1970 lineup. Powered by the 3821 caliber with 24j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-30895bbf5e4a]

Also known as: Sumo, Navigator

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

43mm

Case Thickness

11.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

90m

Dial Color

Green

Jewels

24j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1970

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