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
Pantograph Router with Proxxon 50EF Setup and calibration - YouTube
Milescraft 1298 3D-Pantograph Stencil Jig - District Artisan
Vermont Hardware Router Pantograph #C-23450 NOS New Never Used | eBay