Seiko Cal. 6620 - 306

This Quartz model from 1978 features a 43mm Stainless Steel case. It features a Black dial protected by a Sapphire crystal and offers 170m of water resistance. [seikata-wm-59e8ab380e52]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

9.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

170m

Dial Color

Black

Jewels

26j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1978

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