It was in Pont-Aven in Brittany that the labourers found the treasure trove. First they encountered the shell case. Upon shaking it they noticed there was still something inside. When they opened the case they found 600 gold coins with a face value of 20 Belgian francs. French state police were called in and they put a seal on the find.
The proprietor wasn't particularly surprised by the find as his grandfather had been a coin collector. Under French law the labourers receive half the value of the find, while the other half goes to the owner of the land. The police get nothing as they were only doing their job!