The deck has 53 cards, and its entire structure is based on Astrology. The first three cards – Destiny, The Man's Star and The Woman's Star – have no astrological correlation. There's also a Blue Card, which some authors consider to have a special meaning, while others say that it's just a replacement in case one of the cards is lost. All other 49 are inherently astrological: 7 cards for each of the 7 classical planets. Each card represents a particular aspect of that planet, for instance, amongst the Mercury cards we have ones such The Book (representing knowledge), The Bat (representing theft), The Caduceus (representing exchanges), and so on. The Venus cards include The Lyre (representing the aesthetic pleasures of life), The Two Hearts (representing love) and The Wounded Heart (representing passion), etc.
This decks uses Traditional Astrology, so there are no outer planet cards. Also, planets like the Sun and Jupiter have more beneficial associations, while Mars and Saturn are more "malefic". Knowing Astrology might add more depth to the readings, but the truth is that you do not need to know it in order to use to read the cards, because they are very self-explanatory.
As for the deck itself, the 1961 Grimaud edition comes in very sturdy lift-off-lid box, with a leather-like texture. The deck and its booklet fit very snugly into it. The cards have a good size for small hands – 6 x 9,7 cm (~2.4 x 3.8 inches) – , and the corners are sharp, not rounded. The card-stock has a very good quality, with a glossy but not overly shiny finish and a smooth touch (the cards slide delightfully well while shuffling). The colours are very beautiful and well-preserved, considering the deck is nearly 60 years old. All cards have a golden Art Deco-ish filigree border around the main image, and the back of the cards show golden stars on a dark blue background.
Each card has the symbol of its ruling planet on the upper right corner and, below it, a keyword written vertically. In some cases, the name had been written above the image, which makes me think they might have been a later addition. Also, the cards have a number on the upper left corner.
The booklet has 72 pages and is fairly complete compared to other vintage booklets I have seen. It has instruction in three languages – French, English and German – , and tells a very interesting tale of how the cards came to be. Apparently, a clairvoyant named Belline found these cards amongst some documents that were about to be discarded by one of his clients. They were originally designed in the 19th century by another clairvoyant called Edmond, who lived in Paris and claimed to have predicted Victor Hugo's exile and Alexandre Dumas' success, amongst other events. Belline decided to reproduce this deck so that it could used once again.