Seiko Cal. 6643 - 873

The 6643-873 is a sought-after Spring Drive piece from Seiko's golden era. With its 18mm lug width and 11.7mm profile, it sits comfortably on most wrists. [seikata-wm-b609420a26f8]

Also known as: Tuna, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

11.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Navy

Jewels

28j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1990

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