Still my answer for the aficionado on the question for those ref is:
(1) Cloisonné, because 'one off' or 'super rare' artistic enamel - a statement watch
(2) CR, because of the horological superiority of the Chronometre Royal - or even the 30 mm Chronometre as a principle
(3) Guilloché, because still more atractive than the usual standard