Seiko Cal. 6630 - 339

Released in 1977, the Cal. 6630 with design code 339 was part of Seiko's domestic market collection. It features a Green dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-d368343f2dd3]

Also known as: World Timer, Emperor

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

12.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

50m

Dial Color

Green

Jewels

28j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1977

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