Seiko Cal. 6620 - 218

The Seiko 6620-218 represents an important milestone in Seiko's 1977 lineup. It features a Black dial protected by a Sapphire crystal and offers 60m of water resistance. [seikata-wm-2466faf276e8]

Also known as: Tuna

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

38mm

Case Thickness

13.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Black

Jewels

31j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1977

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