Seiko Cal. 3887 - 870

The 3887-870 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3887 caliber with 18j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-a4a9c3982ef2]

Also known as: Tuna, UFO

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

14.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

110m

Dial Color

Cream

Jewels

18j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1984

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