Seiko Cal. 3890 - 321

This Automatic model from 1981 features a 37mm Hardlex-Coated Steel case. Powered by the 3890 caliber with 35j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-c2791cb13f16]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

11.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Navy

Jewels

35j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1981

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