Roman Coin

Does someone know anything about that coin? It's from my numismatic collection when I was a child. A short research on the web said "Galliemus 253-268 Antoninian" – whatever that means. :) This is another photogrammetry test. Testing a reproducable setup and procedure. And well, unfortunatelly it wasn't very reproducable. Nevertheless, I got a quite okay-ish model. Setup: OpenScanner (www.openscan.eu) in a light tent with 3 soft boxes, Sony Alpha 77 II, SAL100M28 (100mm / f2.8 Macro), 4 chunks with 668 RAW images total, processed in lightroom, Agisoft Metashape, minor texture editing in Photoshop. Source: Objaverse 1.0 / Sketchfab