I got the drawings and code from a gentleman who teaches at a college in Kansas. The drawings are in Metric and say "Peter Smid CNC Programming" in one corner. I have lost his name & E-Mail address so I can't give him proper credit. But Sir, if you read this "Thank You Very Much!!"
The pieces are turned from 1" dia brass and are up to 65MM ( 2.559" )tall. I converted the code to English and ran them on our Haas SL-30. I would share the code with his permission.

Hi, Looks like a Great Chess you made.
If you would like to make your own Chess set or any shape. CAD2Lathe can give you the Gcodes.
Here's a movie that show you how.
YouTube - Chess Set Code by CAD2LATHE
Cheers
Bob A
http://www.cad2gcode.com/cncprojects