Seiko Cal. 3821 - 351

Released in 1971, the Cal. 3821 with design code 351 was part of Seiko's domestic market collection. Powered by the 3821 caliber with 31j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-93abf48aa3c1]

Also known as: Sumo, World Timer

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

8.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

190m

Dial Color

Cream

Jewels

31j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1971

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