I think this is Gallienous. But, it is worn so bad that there isn't much detail on the reverse. It looks like it was over cleaned but there was very little detail to start with. And, is this what is referred to as "radiate"?
I can read the obv legend as [GA] LLIENVS AVG on yours. Looks similar to mine, but I am very novice / entry level for Roman Imperial period. RI Gallienus AE silvered Ant 21mm 2.7g Radiate Cuirassed R - Jupiter L tbolt X RIC 214
Yes, the figure is LAETITIA. You may read more about her here. I have a couple of Gallienus coins featuring Laetitia:
Yep, Gallienus with the Laetitia reverse. This is pretty close: Gallienus, Bi. antoninianus, 3.34 g. Rome mint, sole reign. GALLIENVS AVG, radiate, cuirassed bust right / LAETITIA AVG, Laetitia standing left, holding wreath and anchor. V in upper right field. RIC V-1 (S), Rome 226; Goebl 0498q; Sear 10250. http://www.wildwinds.com/coins/ric/gallienus/RIC_0226_rc_V.jpg
They are called "radiates" because the emperor is depicted wearing a radiate coin like that of Sol. The radiate crown is a symbol for the fact that the coin is worth two denarii, at least in theory. Hence it is called an "antoninianus" after Caracalla who introduced the denomination, sometimes also being referred to as a "double denarius". Of course, by the time of the latter reign of Gallienus nobody knows what they were worth in actuality, since inflation had overtaken the empire's economy by that time. Pic of Caracalla, who started the coinage:
No clue what the reverse is but she's holding a cornucopia. One of the easiest ways to tell Gallienus even with no lettering at all is to look for the grape-cluster neckbeard.
Sadly I've only one Gallienus coin. This was bought on a whim from a dealer's tray many years ago, I think at around $20. My avatar photo is actually a large (42mm) medallion of Claudius II. He came right after Gallienus, in fact he assassinated him. I've been trying to buy additional coins of Gallienus but keep getting outbid. Incidentally recently I've picked up a 2nd coin of Claudius II: a largely bronze denarius. It's one of the last denarii minted tho there are a few by some later emperors too.
Gallienus was also the last emperor to issue the sestertius denomination. After the late 250's and the collapse of the monetary system, the relationship between the large bronze coin and the antoninianus broke down, as silver was reduced in the antoninianus to little more than a thin wash.
Very nice sestersius, I recall bidding on some of his sestersii also. This was years ago. I also remember that they were of squared-off planchlets like yours. Ever since Dennis Kroh* retired from auction representation, I've had horrid luck with dealer reps tho mainly in the world coinage area. The only two that ever got me any decent coins are Ed Waddell (Ancients) and Karl Stephens (World). Oh I should mention that Gallienus.net is working tho they no longer have their https certificate. Link is below, mostly antoninnanii tho. http://gallienus.net * I don't suppose anyone has Dennis Kroh's contact info? I should call just to say "hello"?
Gallienus’ Wife RI Empress Salonina wife of Gallienus 254-268 CE AE Antoninianus 3.61g 20mm Rome mint 267-268 CE crescent Deer / Stag Walking delta RIC 15
Here's my Salonina. You can't see it, but the flan is so thin that there's a significant bend in the coin
