(FILES) A picture taken on February 15, 2008 shows a worker checking a wheel of seasoned Parmigiano Reggiano cheese in a factory in Valestra, near Reggio Emilia. In central Italy, a deposit of prized Parmesan cheese is enough to secure a loan. The unique system dates back to the 1950s and is still used by four banks in the northern Emilia-Romagna region, including one which holds around 400,000 rounds of the cheese. AFP PHOTO / FILIPPO MONTEFORTE (Photo credit should read FILIPPO MONTEFORTE/AFP/Getty Images)
