Quite a number of variations were on the drawing board, a few actually made it into production.

P1 - 1965 The original Triple.	X75 - 1969 Styled by American Craig Vetter.	P68/P76, 1972 The SOHC Engine (just a new cam box really!)
-	P76? - 1973 This was the basis for the 1975 T160.	The "Quadrant" - 1973 Four cylinders!
T180 - 1974? Also known as the "Thunderbird III".	The "Triville" - 1975 A Triple in a Meriden OIF Twin frame.	The "Trisolastic" - 1976 A Triple in a Norton frame.