[KatHCutiE21]

Hello,
I have a Arntz 1965 Cobra Replica. I am wanting to sell it. I ahve been asked to prove it is in fact a real Arntz built . He said that the the Arntz name is under the car which proves it is a real Arntz 1965 Cobra replica. I have been looking all day and cannot find it anywhere under the car
Could anyone tell me where I can find the Arntz name under my car?
Thank You so Much,
K McLean