I really need help with this one before I fork out the money.

Okay I have my eyes on a supposedly HZ Sandman with the following details on the 3 x ID Tags;

Mode: HZ8W M 70
Body No: 397486-A
Trim: 1934 - 63V
Paint: 567-30525


Large Tag: States Holden HZ Panel Van
11/77
AHZ 04112A
GVW: 1950 kg
Seat Capacity : 2

Skinny Tag;

8M70RHL397486z

Please advise if a Genuine HZ Sandman or not ?
Thank you