Watch List notes:

The Roman Empire

Nero augustus, 54 – 68. Sestertius, Lugdunum circa 65, Æ 26.25 g. Laureate head r., with globe at point of bust. Rev. View of the temple of Janus, door to r., decorated with garland. C 146. RIC 438.
Lovely enamel-like dark green patina somewhat tooled around the
legend on reverse, otherwise extremely fine