Seiko Cal. 3878 - 994

The 3878-994 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3878 caliber with 28j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-457ac22783af]

Also known as: UFO, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

8.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

80m

Dial Color

Burgundy

Jewels

28j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1999

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