Seiko Cal. 3847 - 633

The Seiko 3847-633 represents an important milestone in Seiko's 1976 lineup. Powered by the 3847 caliber with 19j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-d4dd85fc558e]

Also known as: Sumo, UFO

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

37mm

Case Thickness

10.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Champagne

Jewels

19j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1976

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