The cards are hand painted and quite beautiful. The label says: Iran, mid-19th century; ink, opaque watercolor, and gold on wood or papier-mâché under lacquered varnish. Since I am not exactly an ās nās expert, by any stretch of the imagination, I think it's best if I just retype the rest of the description posted on the museum label, instead of attempting to write my own.
The full set of cards for the game of ās nās, a gambling game similar to poker, contains twenty cards, with four each of five suits. The suite, in descending order, include the ās (ace); the shāh (king); the bībī (queen); the sarbāz (soldier), represented by one or more soldiers, noblemen, or hunters; and the lakāt, represented by a female of low rank, often a dancer or a servant. Card designs may include traditional and European costumes, floral and vegetal designs, erotic imagery, or mythological creatures. Here, the ās appears in the form of a lion and tiger entwined with a snake-dragon. Ās nās became popular under the Qajars and continued to be played until the end of World War II, when it lost favor to games such as poker, rummy, and bridge.
Although the description on the museum's label states that the ās nās deck consists of 5 suits, other resources state that a full deck consists of either 20 or 25 un-suited cards that consist of 5 court cards, appearing in multiples of 4 or 5, to make up a full deck. I think that's a better description.
Another ās nās deck appears in the collection of playing cards page on my sister site.