Seiko Cal. 3878 - 958

The Seiko 3878-958 represents an important milestone in Seiko's 1999 lineup. Powered by the 3878 caliber with 25j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-a9b4ebf2417d]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

46mm

Case Thickness

11.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Green

Jewels

25j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1999

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