Seiko Cal. 6639 - 234

The Seiko 6639-234 represents an important milestone in Seiko's 1967 lineup. It features a Black dial protected by a Sapphire crystal and offers 120m of water resistance. [seikata-wm-19976c4c3af4]

Also known as: Crown

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

41mm

Case Thickness

9.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

120m

Dial Color

Black

Jewels

31j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1967

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