One large rimlock - 7 1/4in x 5in- which has the extra flange and fixes into the edge of the door. 4 of the flat rimlocks are in good working condition. The other two need some repair - both of them have had their spring tensioners broken. Easy enough job for someone handy or a local metal works. One of these also has a brass piece missing which connects the mortice spindle to the catch.
Update - I found the missing brass bit so both it just needs a spring now. The larger rim lock is fine. I have an old key which kind of works on them, but probably be nice to have a locksmith make up some new brass ones. The item "Rare Set Of Georgian Brass Door Rim Locks By Gibbons Antique" is in sale since Monday, September 9, 2019. This item is in the category "Antiques\Architectural Antiques\Locks, Latches & Keys". The seller is "paulandlaura" and is located in Westgate on Sea, Kent. This item can be shipped to United Kingdom, Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Australia, United States, Bahrain, Canada, Brazil, Japan, New Zealand, China, Israel, Hong Kong, Norway, Indonesia, Malaysia, Mexico, Singapore, South Korea, Switzerland, Taiwan, Thailand, Bangladesh, Bermuda, Bolivia, Barbados, Brunei darussalam, Cayman islands, Ecuador, Egypt, Guernsey, Gibraltar, Guadeloupe, French guiana, Iceland, Jersey, Jordan, Cambodia, Liechtenstein, Sri lanka, Macao, Monaco, Maldives, Martinique, Nicaragua, Oman, Pakistan, Peru, Paraguay, Reunion, Saudi arabia, South africa, United arab emirates, Ukraine, Bahamas, Colombia, Jamaica, Kuwait, Panama, Qatar, Uruguay, Viet nam.