** 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.
Oh BTW do you take the pictures of your coins yourself, and if so, what equipment are you using? I'm trying to learn macro photography with a DSLR but so far I'm struggling with lighting and depth of field. Those pics of yours seem top notch, great detail and clearly lit without being too sharp or soft anywhere.
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.