Here is a great video showing how to copy carve a rotary phone out of a chunk of wood using a router. The video comes from Matthias Wandel, who runs the amazing Woodgears.ca. Check it out if you haven’t already, it’s on my list of the 100 best sites for the prop maker. He is an engineer by trade, and approaches woodworking from a unique angle.
I just (re)discovered his YouTube channel, where he has videos for many of the projects he posts on his site. The aforementioned video for copy carving a phone is there, as is a video showing how to build your own copy carver.