Seiko Cal. 6643 - 971

The 6643-971 is a sought-after Quartz piece from Seiko's golden era. It features a Green dial protected by a Mineral crystal and offers 200m of water resistance. [seikata-wm-1b966d7bc0c7]

Also known as: Sportsmatic, Crown

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

40mm

Case Thickness

11.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Green

Jewels

31j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1973

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