If you look at the very bottom of the card illustration, you'll see the name "Douglass, 27 N. 10th St., Phila." as in the Douglass Post Card & Machine Company of Philadelphia.
That company was involved in a rather interesting copyright infringement case with the courts back in the day, the case for which is still cited today. For those not interested in the "legalese" of all the points involved, here's a summary:
