Seiko Cal. 3878 - 642

The Seiko 3878-642 represents an important milestone in Seiko's 1997 lineup. Powered by the 3878 caliber with 21j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-2e4a2875fe83]

Also known as: UFO

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

46mm

Case Thickness

12.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Burgundy

Jewels

21j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1997

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