RIC 232 is rated S, but
RIC 237
Officina P is rated C3. So this coin is as common as can be, according to
RIC.
Your coin was minted A.D. 312.
@justusmagnus: Using
wildwinds for attributing is misleading in this case. You will see that
RIC 232 has RP in
exergue and
RIC 237 RT or RQ. In fact
RIC 237 can show RP in
exergue as well, and in this case is indistiguishable from
RIC 232. Knowing the fact that the offinina normaly doesn't affect the
RIC number, without looking up
RIC I would have thought that either
RIC Rome 232 or 237 is misattributet on
wildwinds.
Stefan