About three thousand coins have been recovered from the different digs in Saint-Marcel. 84% of these have been identified; the remainder mainly consist of Gaulish coins damaged by oxidation.

All these coins have been isolated discoveries: there has been no hidden treasure at Argentomagus! No gold coins have been brought to the surface except for several damaged staters , of which only the bronze remained.

Amongst the silver coins, forty or so have been identified as denarii , of which eleven were Bituriges, and around thirty obols or hemiobols which are, for the most part, copies of massaliote coinage.

The most common currency, by some distance, is that of the Bituriges. Essentially, it comprises bronze coins, the so-called "anonymes des bituriges", depicting a wolf's head on one side and Pegasus on the other and smaller bronze coins with a wild boar on the reverse.

The years between 260 and 280 are the best represented in the collection.

The billon, a coin made from an alloy of silver and copper, after weakening quickly, became a simple copper disc weighing several milligrams and identified by the image of Tetricus.

The workshops which produced these coins were all from western Europe: Italy, Gaul, Rome and Lyon and, later, Trèves, Cologne and Arles. A tiny number of coins from more distant workshops such as Thessalonika and Cyzique, have been discovered.