Seiko Cal. 3878 - 765

The 3878-765 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3878 caliber with 21j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-dec2835b01e7]

Also known as: Shogun

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Silver

Jewels

21j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1971

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