Do the aftermarket lamp lenses have the numbers cast into them like the originals?

[Original example "SAE PI 68" for a 1968 parking indicator.]

Would this be something to look for when trying to confirm a true 68 RS?

Thanks,

I just did a search of aftermarket lenses. "Technically Correct" includes the cast-in numbers on the replacement lenses. I didn't do a search because I didn't remember ever seeing that in the description before.
My apologies for a needless post.

Hi,
I bought a set from these guys and they are advertised as correct...You might give them a shout.
http://www.chqreproductions.com/