A while back, I did some research on the early days of television, and provide some links that might help you create your own replica. The make blog linked to a nice scan that shows some plans from 1928 for building your own “Baird Televisor” which I thought were really cool.
MAKE: Blog: HOW TO – Build a Baird Televisor

The linked page makes each individual page available as a PDF file, I merged them into a single PDF for easier downloading and printing.. Enjoy!