Seiko Cal. 6378 - 227

The Seiko 6378-227 represents an important milestone in Seiko's 1970 lineup. Powered by the 6378 caliber with 30j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-d9b2cbf97014]

Also known as: Arnie, Flighty

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

13.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1970

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