Seiko Cal. 3856 - 120

The Seiko 3856-120 represents an important milestone in Seiko's 1979 lineup. Powered by the 3856 caliber with 31j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-c105dc524391]

Also known as: Sumo, Navigator

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

34mm

Case Thickness

10.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Cream

Jewels

31j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1979

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