Hi Teknetics, I send you three pictures of my smallest coin ever found with my T². One picture shows the coin next to a Roman Denarius. It is an Obole au Cheval from the Cadurque Celts from southwest France, near the city of Cahors. It dates from about 100 BC. It is only 0.3 grams, 7mm diameter and was about 6 cm deep, found in the All Metal Mode.

JanTheDetectorist (YouTube), France