Here is an old plane that BoxCarMarty helped me find. It seems that the British used a whole bunch of planes to make a window sash. The Americans invented a version to cut the inner and outer groves at the same time.The outer is called the stick because of the sticking board used to make it. The inner grove is a rabbet that the glass would be set in then glazed. My wife has been on me to get her a few old windows so she could put pictures in them and hang em on the wall.
Well being the cheapskate that I am I can now make any size needed.
-- Superdav "No matter where you go - there you are." http://chiselandforge.com