I am the original owner and they have been professionally cleaned by Tiffany only. The butterfly backing has been updated since I purchased these! These heart-shaped sterling silver earrings feature our distinctive Return to Tiffany inscription. Inspired by the iconic key ring first introduced in 1969, the Return to Tiffany collection is a classic reinvented. Wear these playful earrings to add a romantic note to an otherwise minimal look. Sterling silver Size mini