Interesting coins, very different flans, but the same coin!
I can only find the one falus
denomination in the
NGC free world coin
catalog, so I am assuming that one was struck early (the large square one) and one was struck late (the small irregular one).
I imagine this is akin to the silver debasement of
Roman coins going from a high silver content at first to a low silver content at the end of the emperor's reign each time currency is reformed.
Initially the coins are big and nice, but people
hoard them, their values drop, and sooner or later the metal content has to drop to accommodate the lower value, and the craftsmanship worsens in order to increase production speed and accommodate the increased demand.
Another possibility is a
denomination not in the
catalog, but I doubt it.
