This is a very interesting seal. It's metal, and still looks bright , so perhaps it is brass. The seal part is amber colored glass, and the intaglio consists of a man rowing a boat. There is something behind him that could be wings, but I can't tell that for sure. The words are French. They are "Si je vous perd je suis perdu." I don't read French, but according to Google that translates to ""If I lose you, I am lost",." The seal measures 1 inch tall, and weighs 3.57 grams. It is circa 1810.