The theme this month was travelling mints. (Not travel
sweets)
An army on the march would need vast quantities of coin and the technology for minting coins was quite portable. Roman armies may have had mobile mints. Some coins are common in some areas where there was campaigning for example this coin featuring Britannia.
Roman Denarius issued by T. Carisius (46BCE) showing the
moneyer's die, anvil, hammer and tongs
By Classical Numismatic Group, Inc.
http://www.cngcoins.com, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=524450
This bronze as (top coin) , dated to AD 155, was common in Britain but
rare in other parts of the Roman Empire. It may well have formed part of a
special shipment of coin to the island or produced at a travelling mint.
© The Trustees of the British Museum
