I was looking through my trays and found this coin that I have had for a few years, but never got around to photographing it.
It is a Licinius from Rome with the cryptogram in the mintmark. The middle part, EROS, is in Greek; which in Latin is amor. Amor and Roma are palindromes-- they read the same backward or forward.
Licinius I
A.D. 320- 321
18mm 3.0g
IMP LICINIVS AVG, laureate, draped and cuirassed bust right.
D N LICINI AVGVSTI surrounding wreath enclosing VOT XX.
In ex. R [EROS] S
RIC VII Rome 228