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Archivo: Celt with weights of gemstone turtles-01

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Description: Celt are asymmetrical tops which have a preferred direction of spin. If spun in the opposite direction they become unstable and reverse their spin to the preferred direction.
Title: Celt with weights of gemstone turtles-01
Credit: Own work
Author: Ed Keath
Permission: GFDL and CC-by-SA-2.5,2.0 and 1.0
Usage Terms: Creative Commons Attribution-Share Alike 3.0
License: CC-BY-SA-3.0
License Link: http://creativecommons.org/licenses/by-sa/3.0/
Attribution Required?: Yes

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