Seiko Cal. 3857 - 366

The Seiko 3857-366 represents an important milestone in Seiko's 1970 lineup. Powered by the 3857 caliber with 21j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-09289f171983]

Also known as: Sumo, Rally

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

40mm

Case Thickness

9.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

190m

Dial Color

Green

Jewels

21j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1970

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