I recently acquired this Macrinus denarius. After finding its provenance from the 2017-auction at KÜNKER 295 LOT 972, I read in the catalog description "Datierung nach Curtis Clay". Here is the full description: Macrinus, 217-218. AR-Denar, Juli/September 217, Rom; 4,10 g. Gepanzerte Büste r. mit Lorbeerkranz//Salus sitzt l. mit Zepter, füttert eine um einen Altar gewundene Schlange und streichelt deren Kopf. BMC 24 Anm.; Coh. 114; RIC 84. Variante von großer Seltenheit. Feine Tönung, Prägeschwäche auf dem Revers, vorzüglich, Datierung nach Curtis Clay. Curtis Clay is a well know numismatist and expert in Roman coins. He has since 1994 worked for Harlan J. Berk (HJB) as an Ancient numismatist and has published articles on Macrinus' coins accordring to HJB website. https://www.hjbltd.com/#!/bio/43-curtis-clay My question is; how often do you see a catalog description; "Dated by..."? And especially with Curtis Clay? Does it mean that this particular coin was dated by Clay, or just the type? The catalog description is fairly detailed on the time of the dating - namely July-September 217 AD. Macrinus entered the throne as emperor in April same year. Would love any feedback on this. I also love the coin by the way - especially the wonderful image of Salus holding and feeding the snake and how intense her eyes are. Thanks!