They were designed under the leadership of CME Louis Salomon, and built in the Company workshops at Épernay.

The class was built by four manufacturers in six blocks: These locomotives were two-cylinder simple-expansion engines, with Walschaerts valve gear.

They had carrying wheels at both ends, in Bissel trucks of "Est" type allowing lateral movement of ±90 mm.

These locomotives made up the largest tank locomotive class on the Compagnie des chemins de fer de l'Est and maintained the suburban service for Eastern Paris until the electrification of the Paris - Strasbourg line in 1962,[1] being allocated to Noisy, Paris-La Villette and Vaires[1] sheds.

Some locos were leased to Chemins de fer et transport automobile in Provins, i.e. 1-141 TB 407, 447, 455, 457, 460 and 500, which ran in the valley of the river Voulzie between Longueville and Villiers-Saint-Georges and lasted until 1972.