LMCC 5.03.009 - Not in RIC DN MAXIMIANO PF AVG MART-I P-ACIF PLN in exergue, London Mint 307-310 4.64g, 26mm Found in Ivinghoe, Buckinghamshire I spotted this coin on ebay and was puzzled. Finding no such reverse for Maximian in Coinage of Roman Britain, Spink's Coins of England, OCRE or Wildwinds, I started to look around for his 'compatriots'. I remembered reading on a website a month or two ago that Constantine, before Sol took centre stage, had claimed Mars for his patron diety, and I was able to discover this reverse for Constantine. Presuming that the coin was an interesting mule, I grabbed it. I came across this thread in the mean time: https://www.cointalk.com/threads/mars-vs-sol-in-the-first-tetrarchy.353123/ and wondered if my thinking was a little simplistic, and my faith in random internet articles a little optimistic. With this I bravely forced myself to make a Twitter account and decided to Tweet Lee Toone to ask if he had encountered this possible mule before. He promptly and graciously replied that the coin was not a mule at all, but was instead the third known example of the type, LMCC 5.03.009, with one being in the collection of the ANS (http://numismatics.org/collection/1984.146.1195) and the other having been sold in Spink Auction 194, which unfortunately I have been unable to trace so far using internet sources. If anyone has access to this catalogue I would very much appreciate your assistance. It is now clear that I am going to need to purchase a copy of The London Mint of Constantius and Constantine. Please share anything you feel is relevant.