https://www.magnetomagazine.com/articles/maserati-classiche-issues-100th-certificate-of-authenticity-to-3500-gt-vignale-prototype/
Maserati Classiche issues 100th Certificate of Authenticity to 3500 GT Vignale prototype - Magneto
Apr 15, 2026 - Maserati Classiche awards its 100th certificate to a restored 1959 3500 GT Vignale Convertible prototype in Modena.
certificate of authenticitymaseraticlassicheissuesgt