Vetranio, emperor's name misspelled. Centenionalis

Vetranio, emperor's name misspelled; 350 AD, Thessalonica, Centenionalis, 4.84g. Obv. legend var. of RIC-126 (R), officina A=1, and of C-12 (Vienna, 25 Fr.). Obv: D N VERTAN - IO (sic) P F AVG Bust laureate, draped, cuirassed r., seen from front. Rx: VIRTVS - EXERCITVM Emperor standing l. holding labarum inscribed Chi Rho and resting l. hand on shield, TSA in exergue. A scarce reverse type for Vetranio, obviously his first type at Thessalonica, which was soon changed. A specimen with the T and R in Vetranio's name reversed (VERTANIO) was apparently first recorded in the Wiczay Catalogue of 1814, vol. II, no. 4223, pl. VII, 79. This erroneous legend was then correctly noted by Cohen in his first edition, Vetranio 10, but in his second edition, Vetranio 12, the Wiczay coin was wrongly reported to read VETRANIO, so not to be a variant at all! As a result, the VERTANIO error was overlooked in Kent's RIC VIII (1981), pp. 413-4. About ten years ago, however, our customer Stephen Knapp showed us two specimens of RIC-126 with this error, from different obverse and reverse dies, and pointed out that the same misspelling, overlooked by Kent, also occurs on the Thessalonican heavy miliarense of Vetranio in Oxford, RIC-125, pl. 19, which has the same size and the same types and legends as the centenionalis RIC-126. Of the 17 specimens of Vetranio's VIRTVS EXERCITVS centenionalis that are currently in CoinArchives Pro, two show the error VERTANIO: CGB MBS 34, 2008, 1032 (the misspelling overlooked by the cataloguer) and Noble 95, 2010, 5732 (the error pointed out by the cataloguer).Reverse flatly struck . EF