Hybrid manufacturing of collector coins with free-moving features Pedro M.S. Rosado, Rui F.V. Sampaio, João P.M. Pragana, Ivo M.F. Bragança, Carlos M.A. Silva and Paulo A.F. Martins MATEC Web Conf., 401 (2024) 02002 Published online: 27 August 2024 DOI: 10.1051/matecconf/202440102002