** Obverse:** IMP C C VIB TREB GALLVS P F AVG, Radiate, draped and cuirassed bust right two pellets below
Reverse: SAECVLLVM NOVVM, Roma seated facing on throne within hexastyle temple, holding sceptre
This coin was struck in AD 251-252 in Antioch, and is classified as Sear 9648.
I like this coin because it is basically a reissue of a coin struck only 4 years previously by Philip I Arabs celebrating the 1000th birthday of Rome. Saecullum Novum mean the new milennium. It must have been a real crowd pleaser, as the reverse was also used by Herennius Etruscus, Hostilian, and Volusian.
It's been a few years since I did, I never really got it right with lighting I feel. I'm thinning out my collection anyway, but at some point I will take new pictures of my remaining coins and try and relearn or improve my skills.
Iirc, there's no real catch-all trick to it. Each coin requires unique lighting and so on, plus editing. Shiny coins are especially tricky, this one is quite dull.