ND stands for No Drawing. Meaning no drawing was supplied to the printer.

all placards the have the ND in the HQ/HJ era are ones that where edited. To include KPH. This is because of the metric system coming in around the HQ/HJ time. The warning where originally in MPH.

Most HJ's will have the ND. I have seen both the 9930173 and 9930173ND but the ND is the most common one found.

9930173 also suits HQ V8 vans and utes including Sandmans. But when this placard is fitted to a HJ lid it is unique to sandman.

Cheers
Jason