Seiko Cal. 6640 - 100

The 6640-100 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6640 caliber with 20j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-b254af0c98bb]

Also known as: Panda, Golden Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

8.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

80m

Dial Color

Champagne

Jewels

20j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1999

Related Models

• Seiko 5678-977
• Seiko 4530-501
• Seiko 6113-258
• Seiko 3816-896
• Seiko 6342-413
• Seiko 0789-154
• Seiko 6359-529
• Seiko 7145-711
• Seiko 6617-321
• Seiko 5625-163
• Seiko 6151-475
• Seiko 4594-972