Note the term "defined schedule," however: in the above list of the five mints not to regularly strike proof coins, the last three struck coins that are today recognized as proofs.
This leaves Carson City.
The Carson City Mint never received the specialized equipment, such as high-powered coin presses, that Philadelphia used to strike its proof coins. Nor did Carson City’s personnel have experience with striking proofs. That said, the proof 1884-CC dollar is a reasonable facsimile of a Philadelphia product: the signature bold strike and mirror-like fields are there. While the rims are not absolutely square, this can be accounted for by the fact that Carson City had to use circulation-coinage dies to strike the proofs, according to the catalog description.
This proof 1884-CC dollar, produced in an apparent moment of numismatic naughtiness, is a scrumptious treat for the discerning Morgan dollar collector, a sinfully rich dessert served with forbidden-fruit compote. Who wants a taste?