Seiko Cal. 6643 - 520

The 6643-520 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Cream dial protected by a Hardlex crystal and offers 160m of water resistance. [seikata-wm-921434fc28e3]

Also known as: Panda, UFO

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

9.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Cream

Jewels

22j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1984

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