Yes, it has to be the hands. There is some indication that the "system" of hands is called the "hand fitting" (nothing to do with fitting things by hand, or something that fits the hand, but a device - a fitting - comprising hands).

La Reverso joue avec les fuseaux horaires. Une prouesse horlogère: deux cadrans dos à dos, un double aiguillage animé par le même mouvement mécanique
www.horlogerie-suisse.com/2006/jlc/nouveaute-jlc.html

Aiguillage, Hand-fitting. Aiguille, Hand. Ajuster, Fit, adjust. Alternance, Vibration ... Boîte de montre, Watch-case. Boucle, Buckle. Bracelet, Wristlet ...
www.worldtempus.com/wt/1/339/

[F] les nouvelles montre de Harry Winston, OPUS 4. ... Tourbillon à répétition heures, quarts et minutes avec aiguillage des deux côtés et quantième avec grande ...
www.horlogerie-suisse.com/2004/HWinston/nouveautes.html

[E] An example is the recent Opus IV, made for Harry Winston, which combines a tourbillon and minute repeater on one face, and a large lunar phase indicator with date on the other, the two faces with hours and minutes (hand-fitting on each face of the watch which is articulated, perfectly symmetrical and designed to be worn showing either face).
http://www.europastar.com/europastar/magazine/article_displa...

«Fleurier» 42 mm Répétition Minutes Tourbillon à
aiguillage inversé. Cette complication met en valeur les ponts décorés ainsi que le mécanisme de minuterie qui se trouve habituellement au dos de la montre. Les aiguilles ont dû par conséquent être montées en sens inversé
http://www.worldtempus.com/wt/1/9847/ (with photo)

with reverse hand-fitting and cathedral chijme striking mechanism. ...
cobaltpaladin.blogspot.com/2006/02/watch.html

An example is the recent Opus IV, made for Harry Winston, which combines a tourbillon and minute repeater on one face, and a large lunar phase indicator with date on the other, the two faces with hours and minutes (hand-fitting on each face of the watch which is articulated, perfectly symmetrical and designed to be worn showing either face).


--------------------------------------------------
Note added at 2 hrs (2006-07-15 00:13:56 GMT)
--------------------------------------------------

However, if this is a test and you wish to be a translator, you might do better spending time learning to use the Internet to answer your own questions. It is almost inevitably possible ...