Seiko Cal. 3821 - 397

The 3821-397 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3821 caliber with 22j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-106de8181712]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

10.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

60m

Dial Color

Navy

Jewels

22j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1965

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