Seiko Cal. 6640 - 843

Released in 1972, the Cal. 6640 with design code 843 was part of Seiko's domestic market collection. It features a Champagne dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-d9401546c702]

Also known as: Shogun

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

34mm

Case Thickness

11.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Champagne

Jewels

17j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1972

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