Watch List notes:

UNCERTAIN WESTERN EUROPE. Æ As (20mm, 10.63 g, 4h). Countermark applied early-mid 1st century AD(?). MII in rectangular countermark on a bronze as of Augustus. Apparently unpublished in the standard references. Host Fine, c/m VF.

From the Richard Baker Collection.

This countermark could perhaps be interpreted as an imitation of an IMP or AVG type.