Seiko Cal. 6644 - 540

The Seiko 6644-540 represents an important milestone in Seiko's 1972 lineup. It features a Champagne dial protected by a Hardlex crystal and offers 70m of water resistance. [seikata-wm-64c805fb6ec6]

Specifications

Movement

Solar

Case Material

Titanium

Case Width

37mm

Case Thickness

10.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Champagne

Jewels

27j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1972

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