It is a good Ace of Spades. And that story about the tax stamp? It's largely for decks made and sold in Great Britain. Decks in Europe came in a few different styles, but the Rouen style is the one that eventually became the International Standard design - the French, considering it a lesser design to their Parisian deck, made the design primarily for export to the UK, where UK printers started copying it, then some got shipped to the United States, where American printers also started copying it, making for a design that's got some similarities but some differences to the original Rouen models! The florid Aces of Spades required by revenuers in Britain carried over to the US, which for many years didn't tax playing cards at all. It was simply out of tradition (and probably also in no small part to make their product stand out from the others available) that US printers continued making decorative Aces of Spades, minus the taxation terminology.
The law was different in the US, where the stamp usually appeared as a "postage-like" stamp created by the Internal Revenue Service (and some card manufacturers, in the early years) which remained in use for nine out of about ten decades between 1862 and 1965. When the US Federal Government repealed the tax, consumers were so accustomed to seeing it that manufacturers made their own "company stamps", used in conjunction with cellophane simply to show that the deck is unopened from the factory. Another tradition for playing card design that comes courtesy of government intervention!
I believe that Alabama might be the only state in the country remaining that charges a state tax on playing cards, complete with their own version of a tax stamp deck seal. The other states seem content with using garden-variety sales taxes to cover playing cards and other various goods.
