Contact Willem Mengelberg SocietyAdministrative Secretariat:Prunusstraat 272451 XR Leimuiden06-22479177Chamber of Commerce:58547932Bank account:IBAN: NL36INGB0006148687 and BIC: INGBNL2APayable to: Stichting Willem Mengelberg SocietyE-mail: info@willemmengelberg.nl