Seiko Cal. 6660 - 645

This Hand-Winding model from 1981 features a 40mm Titanium case. The Fixed bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-2deb4ae54b71]

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

11.0mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

70m

Dial Color

White

Jewels

18j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1981

Related Models

• Seiko 5219-362
• Seiko 6358-747
• Seiko 0747-209
• Seiko 6145-844
• Seiko 4471-629
• Seiko 4531-547
• Seiko 6193-704
• Seiko 7177-227
• Seiko 7171-800
• Seiko 5271-860
• Seiko 7039-441
• Seiko 7173-749