Seller: dylans81 (1,558) 100%, Location: Kansas City, Missouri, Ships to: US & many other countries, Item: 322331801827 Specializing in Vintage and Antique Architectural Salvage~ * ~ ~ Awesome Antique Mercury Glass Door Knob c. 1800s ~This listing is for a Pair of Antique Mercury Glass Door Knobs! These are in overall good condition, especially the mercury, in which I could only find a very small area of flaking. These are constructed of a mercury coated center that is covered in glass. The glass has a few scratches and wear. These are a bit different than most knobs, as they require a pin instead of a set screw. I will inlcude a small copper pin that can be used, but it's often easier to use a small amount of epoxy or thread lock on the threads of the screws to hold the knob in place. Good working condition. 2-1/4 inch diameter. Please see all the pictures for details and contact me with questions. Thanks!Shipped with the greatest of care.~ * ~Please SEE My Other Listings for Great Architectural Items For more information, please review all the pictures and contact me with any questions. Payment or local-pickup must be made within 7 days of purchase, or the item will be re-listed. I normally do not allow returns, unless the item is not as described. If something comes up, please contact me. Thanks!