Roman Republic, Cn. Plancius, AR Denarius, 55 BCE, Rome mint. Obv. Female head (Macedonia [RCV, Crawford, & RRM II] or Diana Planciana [RSC]) right, wearing causia, CN. PLANCIVS before, AED. CVR. S. C. behind/ Rev. Cretan goat standing right, bow and quiver to left. RSC I Plancia 1, Crawford 432/1, Sydenham 933, Sear RCV I 396 (ill.), Harlan, RRM II Ch. 17 at pp. 141-144, BMCRR Rome 3920. 18 mm., 3.82 g., 5 h. Purchased from Eukratides Ancient Numismatics [Bradley J. Bowlin], Feb. 18, 2020. Ex. Davis & Clark, Paris, France, Jan. 27, 1975 (with “Certificat de Garantie” from Dr. Cahn, agreed expert, Basel, Switzerland.) This page is actually sewn together with its 2x2 cardboard holder, as well as two additional pages with very small photos of the coin, and even has a wax seal attached to the thread: Has anyone ever heard of this dealer, or of the practice of providing a "Certificat de Garantie" based on the opinion of an "agreed expert"? I looked up Davis & Clark on Acsearch and found about 10 coins listed for which it was the dealer, all from 1974-1976. So it appears that at least as an auction company, it wasn't around for very long.