Seiko Cal. 6640 - 467

Seiko 6640-467

The 6640-467 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6640 caliber with 24j jewels beating at 36,000 bph, it delivers a 65 hours power reserve. [seikata-wm-e8b19afc9f0f]

Also known as: Sumo, Golden Tuna

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
38mm
Case Thickness
12.3mm
Lug Width
20mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
190m
Dial Color
Burgundy
Jewels
24j
Frequency
36,000 bph
Power Reserve
65 hours
Year
1999

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