Seiko Cal. 6620 - 424

Released in 1981, the Cal. 6620 with design code 424 was part of Seiko's domestic market collection. The Bidirectional bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-d11b0ca1dd7b]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

14.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Silver

Jewels

27j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1981

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