Hmmm - You Sir are correct.
The article in my attachments says 15, the URL link says 14.
Mr. Google, who of course is never wrong, says:
"Just
14 "Swiss cheese" Catalinas were built, going to established Pontiac drag racers, including Mickey Thompson, Union Park Pontiac, and Maselles at Packer Pontiac. .May 5, 2014"
And:
"Only 14 Swiss Cheese Catalinas were built by Pontiac, and
only nine are said to exist today.
https://www.macsmotorcitygarage.com/...eese-pontiacs/