Seiko Cal. 6643 - 346

The 6643-346 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6643 caliber with 22j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-e210aca4398d]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

41mm

Case Thickness

13.6mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Silver

Jewels

22j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1999

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