Seiko Cal. 3881 - 520

Released in 1982, the Cal. 3881 with design code 520 was part of Seiko's domestic market collection. Powered by the 3881 caliber with 25j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-2bce65bcf2c6]

Also known as: UFO

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

13.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1982

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