I believe it is just a defect in the glass, maybe the green color? Very corroded lid on the salt, inside and out - missing spot of the rim of the lid because of corrosion.Other lid is in wonderful condition. I appreciate your time and interest. The item "Vintage FEDERAL Glass SYLVAN Parrot Green Depression Glass SALT & PEPPER Shakers" is in sale since Thursday, October 7, 2021. This item is in the category "Pottery & Glass\Cookware, Dinnerware & Serveware\Salt & Pepper Shakers". The seller is "ffantiques2" and is located in Archbold, Ohio. This item can be shipped worldwide.