The Valsadornín Treasure, found in 1937 next to the old road linking the Palencia towns of Valsadornín and Gramedo, is one of the most important archaeological testimonies of the insecurity suffered by the Roman Empire in the middle decades of the 3rd century. It is a bronze pot containing thousands of coins, all of them Antoninian, hidden or lost around 270 AD.

Once the whole was assigned to the Museum of Palencia, the vessel, incomplete but still with a significant number of coins attached, was deposited in the National Archaeological Museum (MAN). In 2016-2018 it underwent restoration and various analyses aimed at its study and better conservation, in an institutional collaboration between the Museum of Palencia, the MAN and the Spanish Cultural Heritage Institute (IPCE). Prior to its return to Palencia, it was presented to the public in MAN’s Showcase ZERO between October 2018 and January 2019.

The re-reading of two Roman imperial countermarks, preserved in the National Archaeological Museum of Madrid (figs. 4-5), allows us to clarify and update what is known about the types related to the Legio X Gemina in the Hispanic area: two of them (B-C) are already included in the bibliography, but interpreted incompletely and not related to each other; moreover, a new specimen of type B (fig. 3) confirms the use of archaic cursive spelling for the letter E, in the form of II, and makes the two types B-C unique for the epigraphic customs of the imperial countermarks of the E, in the form of II. 3) confirms the use of the archaic cursive spelling for the letter E, in the form of II, and makes the two types B-C unique for the epigraphic customs of the Roman imperial countermarks.