Seiko Cal. 6643 - 755

The Seiko 6643-755 represents an important milestone in Seiko's 1971 lineup. The Bidirectional bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-1bc1ce51ae3e]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

46mm

Case Thickness

12.6mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Champagne

Jewels

17j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1971

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