Seiko Cal. 3871 - 115

The Seiko 3871-115 represents an important milestone in Seiko's 1975 lineup. Powered by the 3871 caliber with 18j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-182e79612a13]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

45mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Navy

Jewels

18j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1975

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