Luxury jeweler Bulgari is about to celebrate 125 years as one of the world’s most sought-after jewelry brands.

To commemorate the occasion, it is teaming up with an unusual partner: the Poste Italiane, or Italy’s postal service.

Worth 0,60 euros ($0,77), this special edition Bvlgari stamp shows the image of a dazzling necklace from 1965 made from yellow gold and platinum and heavily adorned with amethysts, emeralds and turquoises.

3,5 million stamps will be issued and each stamp is accompanied by an article (detailing the brand’s history) signed by Paolo Bulgari, Bvlgari Group’s chairman.

Collectors can try to pick up these coveted items at post offices in Rome, Milan, Venice and Naples—the only cities in which they will be sold.