Seiko Cal. 6378 - 820

The 6378-820 is a sought-after Quartz piece from Seiko's golden era. It features a Champagne dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-05525939421f]

Also known as: Sumo, Shogun

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

13.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Champagne

Jewels

25j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1988

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