Cartier Trinity bangles - authentic?

[andrea hackney]

Hello Cartier lovers, I just purchased the Trinity bracelet is this the normal markings on the outside of bracelets? I always heard about the inside markings but not anything on the outside?

 

[Austina]

Looking at several sellers images, I can't see markings on the outside of the bangles. The clearest one I could find to illustrate the hallmarks is this one