Seiko Cal. 3870 - 121

The 3870-121 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 3870 caliber with 22j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-09c92a3818be]

Also known as: Golden Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

11.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

150m

Dial Color

Green

Jewels

22j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1978

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