Seiko Cal. 6620 - 337

The Seiko 6620-337 represents an important milestone in Seiko's 1971 lineup. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 160m of water resistance. [seikata-wm-782bb42504ae]

Also known as: Bullhead

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

35mm

Case Thickness

11.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1971

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