It is a modest AE antoninianus of Gallienus: Gallienus, antoninianus Obv.: GALLIENVS AVG, radiate head right Rev.: PROVID AVG, Providentia, draped, standing left, holding baton in right hand and sceptre in left hand; at her feet, globe; in r. field X. This coin is listed as C 862 and graded "c(ommon)". But I cannot find it in the online OCRE catalog. It's probably just me...
Looks like Göbl 634a, 57 specimens in his photofile, so Cohen was about right with "common". RIC 267 also lists the coin, citing Cohen 862 and also rating it as Common. I certainly would have expected it to be in OCRE!
If you click on an individual coin, the reverse legend is down a ways on the right side. I can't say anything good about the organization of this resource except it could have been worse if I had done it.