Very nice coin Martin. Indeed the cuirassed and draped bust right seen from front is much scarcer than the cuirassed bust (only) at this mint. I like very much the style of the emperor's portrait on your coin: it clearly still resembles that of Florian.
Here is my example of a IOVI CONSER from the same uncertain Balkan mint, but with the more common cuirassed bust: AURELIAN RIC TEMP 2503 : Coins, Antique (650 B.C. to 476 A.C), Roman... (colleconline.com)
And finally I also have in collection (but not for long anymore) this great IOVI CONSER ex Philippe Gysen with a very rare and interesting radiate, cuirassed and draped with paludamentum bust right, with right arm visible, and circular decoration on the drapery. This particular coin will be offered on RDA auction VII on 11th April together with 17 of my other Aurelian coins and 70 Probus coins. All the details of the auction are in my post below: Rare Probus and Aurelian coins at RDA auction VII on 10-11 Arpil 2021 | Coin Talk
Great and interesting coins everyone! While I don't have the shorter IOVI CONSER, I do have this coin with the longer IOVI CONSERVATORI legend. It's in my book as unlisted and without a mint. I don't think I ever finished attributing it but it's a cool coin.
Yeah looking back at my notes... it seems when I filtered Helcetica’s Aurelian list, I was left with some coins from Siscia but the style didn’t match. I found the coin type above from Milan and also this one (close in style) linked below from from Serdica. I think I gave up with some open questions on it and never circled back! http://www.ric.mom.fr/en/coin/2553?idType=2553