Seiko Cal. 3887 - 402

The Seiko 3887-402 represents an important milestone in Seiko's 1973 lineup. Powered by the 3887 caliber with 35j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-47d96fe06838]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

11.1mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

100m

Dial Color

Cream

Jewels

35j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1973

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