Oke, the last ID-request for tonight Thanks in advance, learning a lot here! So this is another relatively large coin: Weight: 13.88 g Diameter 29 mm Unfortunately, the vis a vis observe is somewhat pitted. The reverse however is very sharp. It shows some resemblence with the coins I've found of Macrinus and Diadumenian (https://www.forumancientcoins.com/dougsmith/thrace2.html, halfway the page), but it's not the exact same. Would again greatly appreciate any comments!
It's Gordian III and Tranquilina, from Tomis. Your edited images: Here's an example from Roma, a reverse die match to your coin (not sure about the obverse since yours is pretty far gone): Gordian III and Tranquillina Æ29 of Tomis, Moesia Inferior. AD 238-244. ΑΥΤ Κ Μ ΑΝΤΩNIOC ΓΟΡΔΙΑΝΟC CABINIA ΤΡΑΝΚΥΛΙΝΑ, laureate and draped bust of Gordian right, facing diademed and draped bust of Tranquillina left / MHTPO ΠONTOY TOMEΩC, Nemesis-Dikaiosyne standing left, holding scales and sceptre; wheel at her feet, Δ in left field. Varbanov 5708. 14.33g, 29mm, 12h.
That's an obverse die-match, too. Here are a couple others from Tomis. Both are 4-1/2 assaria denominations, one with Δ < to indicate the denomination, the other with the symbols ligated, as in the OP coin. Obverse die-match to the OP; Nemesis reverse: Homonoia reverse:
