Seiko Cal. 6670 - 631

Released in 1976, the Cal. 6670 with design code 631 was part of Seiko's domestic market collection. It features a Black dial protected by a Acrylic crystal and offers 150m of water resistance. [seikata-wm-889c5fecdde4]

Also known as: World Timer, Emperor

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

38mm

Case Thickness

11.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

150m

Dial Color

Black

Jewels

22j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1976

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