Seiko Cal. 6665 - 644

The Seiko 6665-644 represents an important milestone in Seiko's 1975 lineup. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-5fb6f0b21b52]

Also known as: Sea Horse

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Green

Jewels

26j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1975

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