Seiko Cal. 6378 - 859

The Seiko 6378-859 represents an important milestone in Seiko's 1991 lineup. Powered by the 6378 caliber with 18j jewels beating at 36,000 bph, it delivers a 70 hours power reserve. [seikata-wm-acdd7068a2e5]

Also known as: Helmet, Flighty

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

45mm

Case Thickness

14.4mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Green

Jewels

18j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1991

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