Seiko Cal. 3876 - 831

The 3876-831 is a sought-after Automatic piece from Seiko's golden era. Powered by the 3876 caliber with 21j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-9e7df5e1fedd]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

36mm

Case Thickness

10.5mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1976

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