The first commercially available all-metal Router Pantograph. Make mortise and tenon joints super quick and easy; very unique. Higher-res photo and info in comments [975x717] : r/toolporn
Making a Pantograph Engraver & Inlay Router (Luthiers Books): Brenchley, Gary: 9781508699255: Amazon.com: Books
Cool Tools: The Pantorouter Turns Tracing On Its Side | Hackaday