How can you recognise the branding?

How can you be sure it is Grana Padano?

Grana Padano is instantly recognisable.
Each one of its wheels is characterised by its marks of origin.

If those marks are not there, then it is not Grana Padano. 
These marks act as Grana Padano’s unique, personal signature: they distinguish it from any other product.
They certify its quality, its origins and its uniqueness as “traditional cheese”.
Even when Grana Padano has been portioned to be sold, the PDO branding will be on the packaging, making Grana Padano easily recognisable. If the PDO branding is not there, it is not Grana Padano.
How can you recognise the branding?​