Seiko Cal. 3820 - 421

The Seiko 3820-421 represents an important milestone in Seiko's 1990 lineup. Powered by the 3820 caliber with 24j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-c0ce96462da0]

Also known as: Sportsmatic, Golden Tuna

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

White

Jewels

24j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1990

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