This vintage cover is a rare gem, featuring four black corners that traditionally signify confidentiality or significance. On the back, a manuscript is addressed to "À la Majesté le Roi des Belges" (To His Majesty the King of Belgium), adding a regal touch to this historical piece.

What makes this cover even more unique is the presence of a royal black seal, symbolizing authority and authenticity. The combination of the manuscript, black corners, and royal seal creates an aura of importance and historical significance.

Whether you're a collector of royal memorabilia, a philatelist interested in postal history, or someone captivated by the royal heritage of Belgium, this cover is a must-have addition to your collection. It represents a tangible link to the protocols and formalities of royal correspondence.

Don't miss the opportunity to own a piece of history with this vintage cover, adorned with a royal black seal and a manuscript addressed to the King of Belgium.