Seiko Cal. 6643 - 287

The 6643-287 is a sought-after Spring Drive piece from Seiko's golden era. It features a Cream dial protected by a Hardlex crystal and offers 160m of water resistance. [seikata-wm-10346ccfec7d]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

10.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Cream

Jewels

22j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1991

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