Seiko Cal. 6378 - 738

The 6378-738 is a sought-after Spring Drive piece from Seiko's golden era. It features a Champagne dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-20ce2f4ac704]

Also known as: Samurai, Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

13.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Champagne

Jewels

27j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1977

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