Amazing Historic Item Discovery!

I received an email out of the blue a couple of weeks ago. The sender, Alan, had purchased an job lot of items at auction. On opening a small wooden box, he found an item that turned out to be connected to the history of Balintore Castle. Naturally, I was overjoyed at his discovery, and asked for some photos. Alan called the item a "wax stamp", but I suspect it is an "ink stamp" for headed…