This is really scarce... I hadn't seen one before. However, there may never have been real matchbooks produced as this is a "flat" that has never been assembled. Maybe it was determined to be "tabu" to show this royal emblem?

There was considerable bidding competition on eBay for this.

The Chip Rack has this casino open only a few months in 1951 and chips as super rare. Anyone have more history to add?