18th century French combination lock in brass and soft steel. stamped "Deposee" and "8". It has 6 rotating discs rather than the more usual 3 or 4. However each disc also has 16 letters ( letters rather than the more usual numbers), giving the number of possible combinations as 16,777,216 rather than the more usual 4 digit numeral based locks which have a far smaller number of possible combinations of 10,000.
Antique combination lock -- this could be another adaptation if the Rubik's proves too difficult to build. I could build this hollow cylinder with the Hindi numerals and put a light inside of it --- numerals and their shifting component parts would illuminate a surface. Could make a nice lamp as well