There is clearly a strong connection between these gems and the republican coins series as Tassie himself acknowledges.
The coins are RRC 344/1-3 and RRC 404/1.
But I just don’t feel the execution is ancient. I wish I could articulate this sense better. Something about it is too perfect. Especially the lettering. The cameo might be late antique (cf. the Constantine-esque bulging eyes with upward glance), but the other three seem really geared toward the tastes of grand tourists and renaissance audiences…