Seiko Cal. 6221 - 643

The 6221-643 is a sought-after Spring Drive piece from Seiko's golden era. It features a Silver dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-a1777d035772]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

10.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

40m

Dial Color

Silver

Jewels

22j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1971

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