It's been a while since I've come across a new model that I haven't seen before. This one is pretty interesting. It's a 1958 Carteret.
One thing that's interesting is the name... most Hamilton models have men's names but there are plenty of exceptions. Carteret would be an unusual name for a man but there are some towns and counties with that name - so maybe it's named after a place. It could also be related to an surname from Normandy, France.