1. Centre de Recherche et de Restauration des Musées de France (C2RMF) - UMR 171; Palais du Louvre - Porte des Lions, 14 quai François Mitterrand; 75001; Paris; France
2. Federal Institute for Materials Research and Testing (BAM); Richard Willstätter-Straße 11; 12489; Berlin; Germany
3. Numismatic Commission; Academy of Sciences; Ignaz-Seipl-Platz 1; A-1010; Vienna; Austria