Former series? (60 = The Netherlands?)
Current series diplomatic plates are similar to normal series in black on reflective white with the date band in reversed colours, but are valid for three years and have the letters CD followed by a two digit embassy code,(60 = The Netherlands) and a serial number (with 01 for an Ambassador or Head of Mission).
Current series temporary diplomatic plates issued pending the issuance of normal diplomatic plates have the letter B and a four digit serial number (having no significance) followed by the letters CD.