"The crown jewel
The highlight of the Rarity cabinet at IBRA 2023 is the legendary "Bordeaux Letter" with the 1p and 2p stamps of the famous Mauritius POST OFFICE stamps. The valuable letter, provided by the lender via the company Richard Borek in Braunschweig, is today estimated at a market value of up to 6 million euros.
Here is the Info 2 with important information around IBRA 2023. It can be read on your screen and downloaded as a file.