Seiko Cal. 3878 - 986

The 3878-986 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 56 hours power reserve. [seikata-wm-8eb5ff529977]

Also known as: Pogue, Crown

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Black

Jewels

28j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1978

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