https://www.britishmuseum.org/collection/object/C_1867-0101-2246 The king of all 'irregular' flans is listed in the above link.
That is indeed the King of all Irregular Flans. Boy, I wonder how bad the flogging for that one was. I am very fond of flan irregularities of all types. They give ancients unique characters. This one from London is struck on a ragged flan that's typical from the Londinium mint at that time. I really do love the residual silvering on this one as well. Constantine the Great AE Follis 314 A.D., London Mint, 1st Officina 3.40g, 22.0mm, 6H Obverse: CONSTANTINVS P AVG, Bust of Constantine I, laureate, cuirassed, right Reverse: SOLI INVIC-TO COMITI, Sol, radiate, chlamys draped across left shoulder, standing left, raising right hand and holding globe in left hand Exergue: S/P//MLN Provenance: Ex. Paul Munro-Walker, Ex. Victor Clark 2019 Reference: RIC VII Londinium 56, Cloke & Toone 8.06.010 Sometimes we can identify the source of some irregularity. For example, the sprues at each end, top and bottom, of this coin from Ticinium are indicative of a flan preparation process that involved cutting individual flans from a string of them. They just didn't cut all the way to the edge, it would seem. Constantine the Great AE Follis 317 - 318 A.D., Ticinum Mint, 2nd Officina 2.64g, 19.0mm, 6H Obverse: IMP CONSTANTINVS P F AVG, Bust of Constantine I, laureate, cuirassed, right Reverse: SOLI INVI-C-TO COMITI, Sol, radiate, chlamys draped across left shoulder, standing left, raising right hand and holding globe in left hand Exergue: P/-//ST Provenance: Ex. FSR Auction 104, Lot 398 Reference: RIC VII Ticinum 68
This coin is a hemi litron from ca. 405-395 BCE. Curiously this is a cast piece, and the casting spur was never removed from the coin, making for a very dramatically formed coin which probably did not circulate for long, but may have been saved as a curiousity or perhaps never circulated at all. This piece has a portrait of Arethusa on the obverse and a dolphin and clam shell on the reverse. Circa 410 BC. Hemilitron (3.21 gm; 18 mm x 14 mm). Head of Arethusa left, hair in ampyx and sphendone, in field right, laurel twig; whole in linear circle / ΣΥΡΑ Dolphin right, below, pecten. Calciati II, 55, 24. SNG ANS 418. This piece, though unsigned, may have been created by one of the greats of Syracuse minting, as it displays superior skills in artistic approach and engraving.
Fascinating thread, mint masters really had many mishaps Maybe this is a ragged one: Denarius, Rome, 196 - 211 AD 15 x 17 mm, 3.091 g RIC IV Septimius Severus 560; Cohen 97; Obv.: IVL(IA AVG)VSTA Bust of Julia Domna, hair waved and coiled at back, draped, right Rev.: IV(NO) REGINA Juno, veiled, draped, standing left, holding patera in extended r. hand and scepter in l. ; at feet, left, peacock