I'm calling this a Chinese padlock, but I could not find a comparable lock of this size or in cast iron to confirm that. Do your own research to make sure I'm guessing correctly. It works as designed and has one key, condition is really good for something that could be well over 100 years old, and it could be over 300 years old as far as I know. This lock is very large and I'm sure it was designed to secure something of great importance. The item "Ancient Large Cast Iron Chinese Pad Lock with Key Works" is in sale since Wednesday, January 29, 2020.This item is in the category "Collectibles\Tools, Hardware & Locks\Locks, Keys". The seller is "mrbadwrench51" and is located in Zephyrhills, Florida. This item can be shipped to United States, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Ecuador, Egypt, Iceland, Luxembourg, Nicaragua, Peru, Pakistan, Viet nam, Uruguay, Bangladesh, Brunei darussalam, Bolivia, French guiana, Guernsey, Gibraltar, Guadeloupe, Jersey, Jordan, Cambodia, Liechtenstein, Monaco, Macao, Martinique, Paraguay, Canada, South africa, Colombia, Barbados, Bermuda, Cayman islands, Sri lanka, Maldives, Oman, Reunion, Philippines.