Seiko Cal. 6378 - 415

Released in 1970, the Cal. 6378 with design code 415 was part of Seiko's domestic market collection. With its 20mm lug width and 13.4mm profile, it sits comfortably on most wrists. [seikata-wm-dbaf48ac4182]

Also known as: Monster, Silverwave

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

13.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Green

Jewels

21j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1970

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