Seiko Cal. 6620 - 331

The Seiko 6620-331 represents an important milestone in Seiko's 1982 lineup. It features a Navy dial protected by a Sapphire crystal and offers 80m of water resistance. [seikata-wm-ae080f01c338]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

80m

Dial Color

Navy

Jewels

17j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1982

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