Seiko Cal. 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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