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Message:: [QUOTE="Valentinian, post: 2523088, member: 44316"]There was a coin reform in 498. Prior to that the copper coins were nummia, small AE4s in the 1-gram range. [ATTACH=full]538233[/ATTACH] [ATTACH=full]538234[/ATTACH] 8 mm. 0.98 grams. Sear 13.  Monogram of Anastasius. There were no larger copper coins, and silver was so rare that the next useful denomination up was the gold tremisis, worth thousands of the tiny copper coins. Obviously, the money system was in a mess. Anastasius reformed it. The reform created the "small module" follis of 40 nummia, but was much less than 40 times as heavy as the 1-nummis (see photo below). Even though copper coins were token coins, the proportion was so out of line that it was protested and after a short while weights were increased substantially, making an impressively large coin (see the OP). The "large module" M coins of Anastasius are more common than the "small module", earlier, version. A small module K (20 nummia) is harder to find than the M. [ATTACH=full]538235[/ATTACH] [ATTACH=full]538236[/ATTACH] 18 mm. "small module" 4.42 grams.The "K" that goes with the "large module" "M" piece is about 27 mm, far larger.[/QUOTE]