Seiko Cal. 6630 - 991

Released in 1977, the Cal. 6630 with design code 991 was part of Seiko's domestic market collection. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 200m of water resistance. [seikata-wm-cd2de33e7581]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

9.3mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1977

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