We have the original drawings, and we used them in the display we did at the FUN show in 2007. It looks an awful lot like the Columbus half - Barber always was a hack - and the existence of the sketches is explained by the fact that in 1899, the date they bear, the status of Puerto Rico was unclear, and someone in Treasury decided it might be an idea to think about a coinage, just in case.

Note that the module of the coin would've reflected the absolute value of the silver, rather than the fiduciary value, as seen in the contemporaneous Morgan dollar.