Seiko Cal. 3878 - 956

The 3878-956 is a sought-after Quartz piece from Seiko's golden era. Powered by the 3878 caliber with 25j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-0a525ae3bc7b]

Also known as: Tuna, Emperor

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

11.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

80m

Dial Color

Cream

Jewels

25j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1970

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