"they were prevented from using the name, Holiday Queen because of a similar name by another owner."

30 year old memories are not always correct. The prevention, could have been caused by a complaint or a law suit after the HQ opened and could very well be the reason the name was changed to Holiday Casino. The 74 re-order could have been ordered and prepaid for, as was the practice in those days, just before the name change. The 74 re-order could have been delivered after the name change.

All speculation at this point.