This denarius is quite rare. One aspect that makes it rare is the addition of "PM" in the obverse legend. Their are other examples similar coins without the "PM" that are somewhat more available than this one.
I was attracted to 2 aspects of this denarius. First was the portrait. Portraits of Galba vary widely across his denarii, but this one is quite unusual. It does not look like the portraits on most of his denarii. The other aspect that attracted me to this coin was the use of Virtus on the reverse. According to one expert, Virtus is female, so the figure on the reverse is the nude emperor Galba himself taking on the attributes of Virtus. Apparently, nude representations of the emperor are unusual on imperial coins.
GALBA, A.D. 68-69. AR Denarius(3.38 gms), Rome Mint, ca. A.D. July 68-January 69.. Obv: "IMP SER GALBA CAESAR AVG PM" Laureate bust of Galba facing right; Rev:: Virtus standing facing, holding parazonium upwards and leaning on vertical spear.NGC Ch F, Strike: 5/5 Surface: 4/5.RIC-236 (R3)
Provenance: From the Graywood Collection.
Coin depicted in the Wildwinds.com database
The image below is used with the kind permission of Stack's Bowers Galleries.