Abstract
Neo-Nazi movements have been highlighted in recent years around the world, being characterized as one of the most dangerous forms of extremism. In Rio de Janeiro, the seizures of materials involved in an apology to Nazism, carried out by the Civil Police, have been following this trend of increase. This study proposed a multidisciplinary approach to historical-documentary research combined with nondestructive physicochemical laboratory techniques (X-ray fluorescence and optical microscopy), seeking greater efficiency and reliability in forensic analysis of authenticity and pecuniary evaluation in twenty Nazi war badges. Only two authentic badges were identified, presenting graphic drawings, masses, dimensions, microscopic marks from the production process and chemical composition of the metal alloys characteristic of the parts manufactured during the Nazi period. The other eighteen badges were characterized as post-war replicas. The total evaluation of the collection shows a price variation between R$4,350.00 and R$10,900.00. Values well below the prices that would be reached if all badges were authentic (range between R$114,000.00 and 340,000.00). The proposed methodology, of multidisciplinary scope, gave efficiency and reliability to forensic analysis of authenticity and evaluation, being able to confirm data discussed for years in the specialized literature.