Seiko Cal. 6645 - 831

The 6645-831 is a sought-after Quartz piece from Seiko's golden era. It features a Champagne dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-0d3b86dd9aeb]

Also known as: World Timer

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

36mm

Case Thickness

15.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Champagne

Jewels

17j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1979

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