Seiko Cal. 6646 - 331

The 6646-331 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6646 caliber with 33j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-9f006fe4ab5f]

Also known as: Samurai, Silverwave

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

43mm

Case Thickness

9.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

50m

Dial Color

Green

Jewels

33j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1988

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