Brands i can offer:
Hublot
Tag Heuer
IWC
Cartier
Patek Philippe
Audemars Piguet
Breitling
Jaeger LeCoultre
Omega
Ulysse Nardin
Chopard
Zenith
How to confirm if they're real or fake? Any certificate of authenticity or confirmation from the brands themselves?
Yes Of course, every brand is being sold via Authorized dealer. Each watch comes with proof of authenticity.