Seiko Cal. 3878 - 746

The Seiko 3878-746 represents an important milestone in Seiko's 1969 lineup. Powered by the 3878 caliber with 27j jewels beating at 21,600 bph, it delivers a 72 hours power reserve. [seikata-wm-a6084fac1f7d]

Also known as: UFO

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

8.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

140m

Dial Color

White

Jewels

27j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1969

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