Say the signature on this shade is authentic.

Dick Stark of Bethesda says.
fake… he signed the other end…easy signature to fake. a bit better than his

Another respondent says.
It’s real . Post production signing

Marshall Ketchum of Genoa, NY says.
The F. Carder signature is probably not a forgery.

Finally from Jo Ann Godawa of Bellevue, Nebraska
Absolutely Frederick Carder’s Signature, 100%.