Seiko Cal. 6628 - 171

The 6628-171 is a sought-after Spring Drive piece from Seiko's golden era. It features a Black dial protected by a Acrylic crystal and offers 100m of water resistance. [seikata-wm-11f3b8187782]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

14.4mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Black

Jewels

32j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1999

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