Seiko Cal. 5640 - 669

Released in 1983, the Cal. 5640 with design code 669 was part of Seiko's domestic market collection. With its 20mm lug width and 11.4mm profile, it sits comfortably on most wrists. [seikata-wm-01d653324755]

Also known as: UFO, Emperor

Specifications

Movement

Solar

Case Material

Titanium

Case Width

46mm

Case Thickness

11.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

White

Jewels

21j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1983

Related Models

• Seiko 0719-759
• Seiko 6398-468
• Seiko 5668-388
• Seiko 5665-373
• Seiko 4551-742
• Seiko 6264-920
• Seiko 3846-240
• Seiko 6679-562
• Seiko 5253-852
• Seiko 7027-724
• Seiko 3870-165
• Seiko 3816-229