Seiko Cal. 6378 - 309

The Seiko 6378-309 represents an important milestone in Seiko's 1981 lineup. Powered by the 6378 caliber with 28j jewels beating at 28,800 bph, it delivers a 62 hours power reserve. [seikata-wm-1f2810e5883d]

Also known as: Monster, Bellmatic

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

45mm

Case Thickness

10.1mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Champagne

Jewels

28j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1981

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