Large Clock for Architectural Project

Hi everyone,

I was wondering where I could buy an (old/antique/vintage) Railway, Street or Tower Clock for a facade of an Architectural Project, I dont mean the new ones where its powered by battery, preferably a mechanical version like the ones used 50 to 100 years ago. Ive looked through the net with no luck. Price up to 15k is OK. Also what would be some of the terms to find better results, like brand names and so on.

Regards,