Seiko Cal. 3857 - 706

The Seiko 3857-706 represents an important milestone in Seiko's 1967 lineup. Powered by the 3857 caliber with 32j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-6caddf3725ff]

Also known as: Sportsmatic, World Timer

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

13.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Black

Jewels

32j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1967

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