Seiko Cal. 6378 - 827

Released in 1974, the Cal. 6378 with design code 827 was part of Seiko's domestic market collection. With its 18mm lug width and 13.7mm profile, it sits comfortably on most wrists. [seikata-wm-df5d8bbb70dd]

Also known as: Baby Tuna, Flighty

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

13.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Navy

Jewels

33j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1974

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