The helmet is the signature of a race car or motorcycle racer whether amateur or professional.
Their design, the sponsors if that have them of course, some are team and others are private sponsors.
The helmet manufacturer often has an investment in the more higher profile motorsport professionals.
Helmet linings vary as well in colour and shape, and they often change year to year.
Visors are usually bullet proof material and often visor strips carry a brand, a team name, a manufacturer or a private sponsor.
You need to know the replica is not a blank cheap helmet painted up. And if you believe the helmet is an original, the standards tagging inside the helmet is hard to fake.