New data concerning the Serdica workshop during the reign of Probus, in Revue belge de numismatique , CXLVI, Brussels, 2000. Does anyone have this article, or know if it's available online? I'd be curious to read it, including for the explanation of the new dating of the 4th emission. Here are the two coins; my apologies for the repetition in my descriptions. Both coins have quite a bit of silvering remaining. The new coin: Probus, silvered billion Antoninianus, Serdica [Sofia, Bulgaria] Mint, 1st Officina, 4th emission, 280-281 AD (Gysen), 277 AD (Sear). Obv. Cuirassed bust left wearing radiate helmet, seen from ¾ in front, holding spear over right shoulder with right hand, and shield covering left shoulder with left hand, IMP CM AVR PROBVS AVG / Rev. Probus on horseback pacing left, with right hand raised and holding long scepter with left hand, captive is seated left under raised right hoof of horse, leaning forward to left with his arms bound behind his back, VIRTVS PROBI AVG; in exergue, KA•A• (Serdica Mint, Officina 1). RIC V.2 Probus 887 (p. 114); Cohen 925/926; Probuscoins.fr 2201 (https://probuscoins.fr/coin?id=2201); P. Gysen Type: VIR-adv [Philippe. Gysen, New data concerning the Serdica workshop during the reign of Probus, in Revue belge de numismatique, CXLVI, Brussels, 2000] (redating Serdica Emission 4 at 280-281 AD); Pink, Emission 4 [Karl Pink, Numismatische Zeitschrift, Der Aufbau der Romischen Munzpragung in der Kaiserzeit, VI / 1 Probus (Wien, 1949)]; cf. Sear RCV III 12075 (ill.) (same except obv. legend has “PF” before AVG; see RIC V-2 886). 23 mm., 4.26 g. Purchased from Kirk Davis, Feb. 2021; ex. York Coins, UK, 2010. If you're able to zoom in at all, is that some kind of plume sticking up vertically from the captive's head? It's rather odd-looking. I also feel quite bad for the captive, since he's not only in danger of being trampled by Probus's horse, but looks like he's about to fall forward off the baseline, into oblivion! The previous coin: Probus, silvered billon Antoninianus, Serdica [Sofia, Bulgaria] Mint, 3rd Officina, 4th emission, 280-281 AD [Gysen]. 277 AD (Sear). Obv. Cuirassed bust left wearing radiate helmet, holding spear and shield, transverse leather strap across chest, IMP C M AVR PROBVS PF AVG / Rev. Probus on horseback, shield in left hand, galloping right, about to slay an enemy with a lance held in right hand; the enemy is on his knees under the horse's front hooves with his hands thrust upwards, his shield on the ground under the horse, VIRTVS PROBI AVG; in exergue, KA•Γ• (Serdica Mint, Officina 3). RIC V-2 Probus 877G( Γ) (p. 113); Cohen 917; Probscoins.fr 2667 (https://probuscoins.fr/coin?id=2667); Pink [Karl Pink 1949], 277, 4th emission; P. Gysen type: VIR-1 [Philippe Gysen, New data concerning the Serdica workshop during the reign of Probus, in Revue belge de numismatique , CXLVI, Brussels, 2000] (redating Serdica Emission 4 at 280-281 AD), 24.31 mm., 3.26 g. Speaking of Philippe Gysen, anyone interested in Probus might enjoy browsing through the lots from the Paul-Francis Jacquier Numismatique Antique Auction 45, from Sept. 14, 2018. Part of it was devoted to the sale of Gysen's own collection of more than 400 Probus coins, many of them not listed in RIC. See https://www.numisbids.com/n.php?search=probus&p=sale&sid=2695&s=b. The auction catalog can be downloaded at http://www.coinsjacquier.com/images/content/Jacquier45.pdf. Please post your own Probus coins from the Serdica Mint.