This medal was initially in a 2003 mint set dedicated to Bucarest City Museum containing proof coins of 1, 5, 10, 20, 50, 100, 500, 1000 and 5000 lei.
The medal is from 800/1000 silver,28 mm, 10 grams in Proof quality, mintage of 10.000 ex.
Official price of mintset was in 2003 400.000 lei (aprox 20$). Only the medat today is in value of 20$... nice aquisition!