It's final! The "Theseus Ring" is genuine.
According to the final report by the Democritus Laboratory, the so called "Theseus Ring" is authentic. Based both on the ring's chemical composition and manufacturing technique, the scientists and archaeologists responsible gave the green light for the purchase to the National Archaeological Museum.
The ring was bought from the Museum for 75,000 Euros, half of its estimated value.
For more info (in Greek), take a look here.