Watch List notes:

Geta. A.D. 209-212. AR denarius (19.1 mm, 2.19 g, 12 h). Rome mint, struck A.D. 211. P SEPT GETA PIVS AVG BRIT, bearded older, laureate head of Geta right / TR P III COS II P P, Janus standing facing, holding thunderbolt and inverted spear. RIC 79; BMCRE 13; RSC 197. aVF, frosty surfaces. Scarce.

There are very few instances of Janus on Roman Imperial denarii.