Peseta comeback?

I love the story in today’s Telegraph explaining that the people of Mugardos in North West Spain are encouraging people to find and spend the defunct peseta in local shops. More than 60 shops on the Galician coast have agreed to accept the currency alongside the euro in an effort to boost trade. The only way to change pesetas for euros in Spain is at the Central Bank and the shops are hoping they will collectively receive sufficient amounts as to be able to contrive an exchange deal. It's early days but apparently people are making their way across Spain to exchange long forgotten hordes of notes and coins.

Firstly, anything that helps the local economy must be good and I wish them well. Secondly, I wonder how much worth of legacy European currencies are still sitting in forgotten boxes etc. right across Europe, a tidy sum no doubt. Who forgot, neglected or couldn't be bothered to change their old notes, who lays claim to sitting on a tidy pile of foreign wonga. Let’s hear from you.