Seiko Cal. 6640 - 829

The 6640-829 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6640 caliber with 35j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-ceea1993eafe]

Also known as: Monster, Navigator

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

8.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

30m

Dial Color

Champagne

Jewels

35j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1985

Related Models

• Seiko 6166-295
• Seiko 6111-132
• Seiko 6186-973
• Seiko 5668-965
• Seiko 7195-137
• Seiko 4460-562
• Seiko 6298-473
• Seiko 6688-876
• Seiko 3896-256
• Seiko 5677-450
• Seiko 4482-547
• Seiko 4549-536