Ancient Danubian Rider Lead Votive Plaque - 3rd to early 4th centuries AD

You are buying the Roman period votive plaque in the image. The front and the back have been photographed. This is a fragment of a larger piece.
Size: 68mm high x 45mm wide
Made between the 3rd to early 4th centuries AD

One snake drinking (?) water flowing out of a crater with lid.
Busts of Luna  
Goddess with arms spread out, standing on a small pedestal.
One horsemen, with Phrygian cap, trampling on prone male figures.
Standing figure wearing ram-head mask behind horseman

The information below comes from Shawn M Caza (2021)

They have almost exclusively been found along the Danube limes, from Dacia and Moesia Inferior, through Moesia Superior and Pannonian Inferior where they are most common, and into Pannonia Superior and Noricum. They are very rarely found outside this area. Based on finds, all authors agree that the main types at least were made in or near Sirmium (modern Sremska Mitrovica in NW Serbia).

The distribution pattern has caused some authors (e.g. Iskra-Janošić) to attribute them primarily to the Roman military. However, other authors (e.g. Domiter) have assigned them to the general population of immigrants from eastern lands Asia Minor, Syria and Greece) who settled in the Balkans in the late second and third centuries. This grouping of peoples would of course include soldiers and their families.

They are believed, due to the limited contextual evidence and the of figures, busts, clothing and hairstyles, to date from the early third to early fourth centuries AD.

Lead was a magical metal in the Roman world. It was connected with votive offerings, luck and the dead (Pluto). Lead was regularly used for votive items as well as things like curse tablets (defixiones)