Error coins interest me ... and coins containing multiple errors greatly interest me! The Flavian 'o' mint produced such coins in abundance and they are quite coveted by collectors today. My latest addition is yet another ex Curtis Clay coin from that error-prone mint. Domitian as Caesar [Vespasian] Engraver's Error Mule AR Denarius, 3.41g Ephesus (?) mint, 76 AD Obv: CAES AVG F DOMIT COS III; Head of Domitian, laureate, bearded, r., 'o' mint mark below neck Rev: ION (sic) MAX TR P COS V; Winged caduceus RIC Cf. 1491/1489A. BMC -. BNC -. RPC -. RSC -. Ex Harlan J Berk, MBS 224, lot 129. Ex Curtis Clay Collection. Ex Numismatic Naumann, E50, 5 February 2017, lot 515. An unknown eastern mint struck a spate of denarii in 76 which copied many contemporary types from Rome. Both RIC and RPC speculate it possibly could be Ephesus, citing a similar style with a previous Ephesian issue from 74 and the use of an annulet as a mint mark. The series is riddled with error coins, such as this rare Domitian Caesar engraver's error mule. Here we erroneously have 'ION' instead of 'PON' in the reverse legend. The ION (sic) MAX COS V is a muddled reverse incompatibly struck for Titus Caesar (he could not have been PON MAX). So, a misspelled erroneous reverse impossibly intended for Titus Caesar paired with a Domitian Caesar obverse. Three mistakes on one coin! Same obverse die as RIC plate coin 1491. Possibly the only known specimen. In hand. Feel free to share your error coins. Thank you for looking!
Very interesting! Error coins usually are. They often reveal something about the process or conditions of coin production that we can't see from the ordinary/successful ones. I'm not sure if I have any multiple-error coins... Closest that comes to mind is an imitation-error coin -- a brockage of a tiny (AE10) Constantinian imitation from Britain, I think. This is one of the smallest brockages I've ever seen (10mm & only 0.43g). The only others that are even close to this light are Trachy, presumably because cupped flans got stuck on the die more often. I also love tiny coins. And imitations.
David - I'm an avid collector of mint errors as well. Eventually I will get around to posting a thread about them but until then here are a few of mine: Gordian III, RIC IViii 172 (b), double struck reverse. I actually have a die matched pair of these error coins Gordian III, RIC IViii 213, triple struck obverse and reverse (that's right 3 strikes with rotation) sorry for the low resolution image, I still have a lot of coins that need to be photographed Philip I, RIC IViii 31, double struck obverse and reverse (based on the level of detail it appears that new dies were used) Trajan Decius, RIC IViii 10 (b), triple struck obverse