Seiko Cal. 6378 - 721

This Automatic model from 1979 features a 41mm Stainless Steel case. It features a Green dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-524da1c67bff]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

9.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Green

Jewels

25j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1979

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