Novag seem to have produced fewer models that can be described as rare than other major manufacturers. Perhaps only the Robot Adversary, Savant II, Savant Royale and Solo Deluxe Z deserve the rare description. The Novag Diablo is also quite difficult to acquire.

So, as I do not have a Savant Royale this feature will include these from my collection :-

(1) Savant II
(2) Robot Adversary
(3) Diablo
(4) Solo Deluxe Z