Later, sorry. 214-212 BC. In the mid 3rd century BC all the heavy
Roman aes were
cast not struck. 70 grams does seem to be the upper
weight limit of these struck bronze coins, and most were struck at about 55-65 grams, with a
standard weight of probably 1/5 a
Roman pound or 65 grams. Flans were made in two-sided closed moulds which we can see both from the edge seam on the lower coin and also from the casting hole defect on the upper coin. These heavy struck coins (and their heavy fractions), are one-tenth of an early
denarius of 4.5 grams silver. It is possible that some of these heavier coins were struck over
Ptolemaic heavy drachms, but I haven't seen evidence.