Seiko Cal. 6643 - 442

The 6643-442 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Silver dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-3e60bf6593a4]

Also known as: Emperor

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

15.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Silver

Jewels

23j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1974

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