<VV> How do you Identify a true Spyder from a fake one

[Cepak, Tom A]

I know in 1964 the Spyder had its own identifiable serial number.  In
'62 and '63 the Spyder was an option right?  If it was an option, how
can you tell if it truly is a Spyder or if someone added the stuff to
appear as one?