XX7 is actually the option code used by Holden for the special vehicle package - Sandman 10cwt.

XU3 is the option code for special vehicle package - Sandman 14cwt.





As stated above the Acacia Ridge plant stamped the option codes for special vehicle packages on the body plate.

HJ van with XX7 special vehicle package - Sandman 10cwt


HX van with XU3 special vehicle package - Sandman 14cwt


HQ Kingswood sedan with XV4 special vehicle package - GTS Monaro