Seiko Cal. 3878 - 242

The Seiko 3878-242 represents an important milestone in Seiko's 1972 lineup. Powered by the 3878 caliber with 25j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-4047724ffc5e]

Also known as: Emperor

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

10.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1972

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