Unlocking the Royal Vault: The Royal Family's Most Memorable Gifts

1. Post-It Note Holder

Given to: Elizabeth II, the queen Given by: Edinburgh Jewellers; estimated worth: $50* During their visit to a high-end silversmith in Scotland in 2016, Queen Elizabeth II and her spouse Prince Philip were presented with a handcrafted sterling silver Post-it note holder.

Queen Elizabeth II Post-It Note Holder ©PA Images/alamy We have a tiny birdie telling us that this could be very helpful. According to People, the company's CEO, Stephen Paterson, informed the Queen, "It's a Post-it note holder for your desk." Her Majesty said, "Oh, that's very kind," in response. It's quite helpful. According to a magazine source, the Queen frequently used post-it notes.

2. A Digging Machine

Given to: Elizabeth II, the queen Contributed by: Crossrail Estimated worth: $15 million In 2016, Queen Elizabeth II was given tunnel-under London drilling equipment as a birthday present. Crossrail, a central London train construction project, gifted the machine to Her Majesty.

Queen Elizabeth II: A Digger's Machine @arstechnica/Pinterest Undoubtedly, this is among the strangest presents Queen Elizabeth ever had. Additionally, Crossrail "sent the Queen a tooth from a tunnelling boring machine called Elizabeth," according to The Mirror. What the Queen did with the contraption in the end and its current location are unknown.