Seiko Cal. 3857 - 166

Released in 1986, the Cal. 3857 with design code 166 was part of Seiko's domestic market collection. Powered by the 3857 caliber with 27j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-7125e53fb73e]

Also known as: Panda, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

15.6mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1986

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