Seiko Cal. 6643 - 618

The 6643-618 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Green dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-0b13b0a7ea4f]

Also known as: Crown, Emperor

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

11.0mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Green

Jewels

17j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1995

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