Seiko Cal. 5644 - 710

The Seiko 5644-710 represents an important milestone in Seiko's 1968 lineup. It features a Navy dial protected by a Hardlex crystal and offers 80m of water resistance. [seikata-wm-269a3e2a70b2]

Also known as: UFO

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

41mm

Case Thickness

15.7mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Navy

Jewels

33j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1968

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