The nearly complete set of signal flags captured from the
CSS Jackson in May 1865 contains a swallow-tailed yellow
and blue 52" X 91" flag.
Housed at the M.O.C. in Richmond as WD#486.
The "e-bay" flag in question is at best a gerry-mandered
post civil war naval signal flag.
Another example of the lengths taken by unscrupulous people
to separate the unwary from their money.