Seiko Cal. 6378 - 665

The Seiko 6378-665 represents an important milestone in Seiko's 1984 lineup. Powered by the 6378 caliber with 28j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-657781c34eb7]

Also known as: Pogue, Helmet

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Champagne

Jewels

28j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1984

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