Seiko Cal. 6643 - 927

This Solar model from 1970 features a 42mm Stainless Steel case. It features a Navy dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-77f2160fd57c]

Also known as: Sumo, Navigator

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

13.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

19j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1970

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