The references mention a small copper coin (that might be Prutah). The coin that you found in Numista catalog it's from third year of the reign of Simon Nasi. Basically the difference between year two and year three it's the design of the amphora (simple amphora for 2nd year, covered amphora for 3rd year) and the legend.
Legend for 2nd year: Shenat Shetaim
Legend for 3rd year: Shenat Shelosh
I would be glad to type the legend in paleo-hebrew to see the difference but I don't have a font that support paleo-hebrew script. Anyway I am sure your coin has been issued in the second year. And
here is the link in the catalog.