This small coin has an obverse that looks like Tetricus I paired with a reverse that resembles a Tetricus II reverse with a vase. Tetricus A.D. 271- 274 minimi 9.5x10.5mm 0.6gm
I have something similar -- a little 13 mm coin with a face similar to Tetricus: Imitation Roman AE antoninianus 0.86 g, 13.2 mm Obv: Nonsensical inscription, radiate bust, right Rev: Nonsensical inscription, female figure standing left, holding uncertain object in right hand and cornucopiae and scepter in left hand.
I have seen many examples of tiny imitative coins from this time period. In particular, I probably have more examples of mini versions of the Claudius II CONSECRATIO with the altar reverse than official versions. Here's a typical example, about the same size as the OP: Must have been a pretty wild time in the Gallic Empire.
So that's what mine would look like if it had been struck with fresh dies, had received a quality strike, and the flan had not been so poorly done...you know, basic quality control.
here's a neat minimi. It's copying an official Constantinopolis with GLORIA EXERCITVS two soldiers reverse. Official examples are pretty small at around 15mm, but this unofficial one is 10.5mm and 0.63gm. It would have been struck around A.D. 335ish.
Me, too but it is much too small. My records say I bought it in 1989 from a dealer named Dorney for $5. My favorite barb is this left facing who??? OIII on obverse - rudder on reverse is held by Fortuna???
here's an unusual one I sold a few years ago. It is a poor attempt at copying a gold coin of Severus III-- note COMOB in the exergue. 10mm 0.5gm below is an example from Wildwinds of what this is copying