Travis Marlatte wrote:

N97164 does not show up in the US registration. That doesn't mean that it
never was. Just that it isn't now.

N17964 is registered as a Schweizer model SGS 2-33 as of 1992.

Thanks Travis.

I kinda figured that with the age of the TV show from the early 60's
that there was a good chance that those numbers could now be
re-assigned to different planes or not in use at all.

Thanks to all who answered.