the tunnel between saint-michel boulevard and porte de choisy was delivered by the city to cmp in november 1929. in less than three months, the platform was completed, the lighting installed, and access made possible. line 10 arrived at "place d'italie" on 15 february 1930 and at "porte de choisy" on 7 march of the same year, borrowing the platforms of the future line 7. before its renovation, the line serviced nineteen stations.