Seiko Cal. 6640 - 323

Seiko 6640-323

The 6640-323 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6640 caliber with 21j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-33565ccc141b]

Also known as: Arnie

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
39mm
Case Thickness
8.6mm
Lug Width
19mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
80m
Dial Color
Cream
Jewels
21j
Frequency
28,800 bph
Power Reserve
49 hours
Year
1998

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