Featured Antique bronze door handle

They would best be sold at a specialized auction. The auction house would provide you with an estimate based on what they are and their provenance.

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Although interest would likely be regional, you would ideally want the largest possible audience. For that, you would start by contacting Sotheby's and Christie's.

https://www.sothebys.com/en/

https://www.christies.com/

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