Seiko Cal. 6643 - 950

The Seiko 6643-950 represents an important milestone in Seiko's 1965 lineup. It features a White dial protected by a Hardlex crystal and offers 120m of water resistance. [seikata-wm-6dabc5f7f6a9]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

White

Jewels

17j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1965

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