Seiko Cal. 6644 - 668

Released in 1965, the Cal. 6644 with design code 668 was part of Seiko's domestic market collection. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-01035c610c9d]

Also known as: UFO, Arnie

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

10.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Champagne

Jewels

19j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1965

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