Auction Catalogs November 4, 2011November 5, 2016 jason Auction Catalogs: Sotheby’s 2002 Welsh and Oak Furniture Sale including the Peter Phillips Lock and Key Collection Schofield Auction House’s previous Lock and Key Catalogs Morphy Auctions March 30th 2013 Premier Advertising (Safes) http://www.antiquesnavigator.com/antiques-price-guide/antique-padlocks-price-guide.html Sort of a catalog. Historical prices compiled from eBay