Interesting cat history. So are those what are known as "mackerel" markings? It's a little different from the usual tiger stripped "tabby" markings...
I guess I am part American Bobtail; I just have about 3" of tail — born that way, as was two others of my four littermates.
=^..^=
No. The swirls are unique to the American Shorthair. Mackerel tabbies like Moe's brothers Larry and Curly , (same mother different fathers most likely) have the stripes running up and down.
moe, larry & curly