Seiko Cal. 3820 - 921

The 3820-921 is a sought-after Automatic piece from Seiko's golden era. Powered by the 3820 caliber with 19j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-7fa6797bf9d9]

Also known as: Tuna, Pogue

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

9.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

70m

Dial Color

Navy

Jewels

19j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1973

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