Constantine I, AE3, 324?, Arelatum, Officina 1

Constantine I, AE3, 324?, Arelatum, Officina 1 CONSTAN_TINVS AVG Laureate head right PROVIDEN_TIAE AVGG Campgate with seven rows, two turrets, no doors, star above, top and bottom rows empty blocks ARLA in exergue 20mm x 21mm, 2.55g RIC VII, -- Ex Carlos Escuer, eBay, August 2003 Notes from Keith Metzer, Arelatum/Constantina Campgate Specialist, August 2003: In Patrick Bruun's book, "The Constantinian Coinage Of Arelate", these coins are discussed. From what I can gather, early in the 20th century, there was a German collector named Otto Voetter, who published his collection. It included two PROVIDENTIAE coins of Constantius II with exergue ARLD. He also mentioned a third coin, with same exergue, but also having S |F in fields. He proposed series of ARLA, ARLB, ARLG, ARLD and S | F ARLA, S | F ARLB, S | F ARLG and S | F ARLD. This would tie in perfectly to the with and without S | F markings on the regular officinae series. Bruun found the first two coins in Vienna, but the only evidence of the S | F coin was from a line drawing in Voetter's catalog. The two coins he saw were a 5-layer and a 6-layer gate, so definitely from different dies. Nevertheless, he decided to dismiss all of these as some sort of error by a mint worker. All of this is mentioned very briefly in RIC VII in the footnotes to Arles 312. I would say your new specimen, from officina A, puts more evidence to Voetter's original theory. Besides a new officina, this piece is also with a new obverse.