Hi Miguelle,
Please take the earrings out of the box and photograph them on a white paper towel. Also if there are any blemishes on the sides or back, please take a pic of them also. Were these purchased from the original owner? Was there a story to support the earrings being vintage? I don't think bead nucleated freshwater pearls have been around long enough to be considered vintage (at least 20 - 100 years old).