Seiko Cal. 6630 - 424

Released in 1991, the Cal. 6630 with design code 424 was part of Seiko's domestic market collection. It features a Silver dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-eb2aeb59bc56]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

14.1mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Silver

Jewels

22j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1991

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