Seiko Cal. 3871 - 815

The Seiko 3871-815 represents an important milestone in Seiko's 1985 lineup. Powered by the 3871 caliber with 32j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-3a6685eea076]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

12.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Silver

Jewels

32j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1985

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