Engine Stamps - what should they be?

[Blocker]

So can QR be a HZ engine number ?

That's what he said.

QR = HQ to HZ

[Wally]

That's what he said.

QR = HQ to HZ

That's clearer. Ta

[Frosty]

The reason for my question is VR is for VB Commodore which was released 9/78 at the same time as this HZ Sandman (10/78). I was wondering if they had changed the engine stamp by this stage?