It took me 2 years to clean this coin which was totally dark and unidentifiable. Now it's sure there's Emperor Caracalla on obverse. The issue is the reverse showing a plowing scene heading left and guided by a priest. I'd be glad if there's only one reference whatsoever that lists this coin. Otherwise, it's an unpublished coin. It weighs 8.86 g.
Its a well known scene, there are many around of Augustus for instance, but usually the oxen are walking the other way.
What makes you sure it's Caracalla? Can you read part of the legend? It's indistinct on the scanned image.
There is an object above the animals on the reverse. It looks somewhat like a vexillum. Adding that search term yielded a potential match from Judaea (Elagabalus): https://www.cngcoins.com/Coin.aspx?CoinID=142656 JUDAEA, Aelia Capitolina (Jerusalem). Elagabalus. AD 218-222. Æ 25mm (9.76 g, 11h). Laureate, draped, and cuirassed bust right / Founder plowing left with two oxen; vexillum in background. Meshorer, Aelia 113; Kadman ; Rosenberger -; SNG ANS -. https://www.cngcoins.com/Coin.aspx?CoinID=270449 JUDAEA, Aelia Capitolina (Jerusalem). Elagabalus. AD 218-222. Æ (23mm, 10.40 g, 6h). Laureate, draped, and cuirassed bust right / Founder plowing left with yoke of oxen; vexillum in background. Meshorer, Aelia 113a; Sofaer 97. ... This is not a complete search by any means and this is just a possibility.
This is a former photo by digital camera with Photoshop enhancements. I'll be posting more digital photos. This photo made me more likely tending towards Caracalla. There's also the letter S in exergue. We'll have fun guessing about the presumed unpublished coin. Ha..
Looking forward to the additional pictures Yeah... I think you have it backwards. Assume the coin is published until it can be proven otherwise. Also, it isn't possible to declare a coin unpublished if the coin cannot be identified in the most basic ways. You have to have at least some of these things: readable (or partially readable) legends, identifiable portrait, identifiable reverse legend and markings, identifiable reverse devices. So far we have a reasonably good guess about the reverse scene but the other items are lacking. Hopefully your better images will shed light on a few more details.
The obverse could start with (AYK) as allegoric for provincial. Then it might follow with Delta Epsilon C. That would be the first 3 letters of Herennius Etruscus' imperial name, which is Decius. What you think ? Have a look..