One of the early HZ's GVW for a XX7 sandman is correct for early HQ. Tyre placard is correct for HZ XX7 sandman. Only thing it could be with that GVW is an XU4. But the tyre placard is not for XU4.

Don't cut it up! There is a extremely good chance its a Flamenco Red HZ XX7 Sandman!

WB - 18V in HZ doesn't matter. It wasn't unique to the base model and sandman like it was in HX.