Research Roman coins
There is an amazing sense of discovery in cleaning and research ancient Roman coins “as found”. Science and history come together.
The coins in this set mostly date to the late empire; when the empire had split into East and West ruled by a Tetrarchy. There was great variability in production and coin denominations from this period remain unclear to modern scholars.
Whilst they are generally of low numismatic value cleaning coins such as these gives an unequaled sense of discovery.