Seiko Cal. 3857 - 390

Released in 1980, the Cal. 3857 with design code 390 was part of Seiko's domestic market collection. Powered by the 3857 caliber with 21j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-e2d05836c046]

Also known as: UFO, Crown

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

11.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Navy

Jewels

21j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1980

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