Repair of antique clock

Googling "reparation horloge ancienne belgique" immediately and unsurprisingly brought up several possibilities. My inclination would be to go for the one located in Liège (=cité ardente), simply because that city has retained its indigenous population (in a way Bruxelles hasn't) so there should be no shortage there of people with the necessary technical skills.

I suppose it depends on how valuable and how antique, but here are three:

www.an-hor.com/homeEN.html
horlogerie-ancienne.eu/fr/accueil/
axso.be/