Seiko Cal. 3857 - 878

Released in 1970, the Cal. 3857 with design code 878 was part of Seiko's domestic market collection. Powered by the 3857 caliber with 35j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-3c51ba1dadb2]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

12.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1970

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