RSM San Marino: Diplomatic Corps RSM

Diplomatic plates are not very different from normal plates, but they have got red "CD" (Corpo Diplomatico) and then two blue numbers as you can see in the picture. Before 1986 diplomatic plates were similar, but the letters CD were in blue and there was the print "REPUBBLICA DI SAN MARINO" on the bottom edge, but unfortunately I haven't got any picture of them yet.

CD plate of San Marino
1986 - Today