The locomotives numbered 2601 to 2760 with a 4-6-0 wheel arrangement were built for express service. They had driving wheels with a diameter of 2,000 mm and four cylinders which worked in compound. In contrast to most De Glehn compounds, all cylinders were mounted side by side. But they still drove different axles, with the high pressure cylinders working on the second driving axle and the low pressure cylinders working on the first driving axle. The boiler used finned Serve tubes to increase its heating surface.

160 were built by different companies in France, Germany and Austria between 1905 and 1912. Only ten delivered by Henschel in 1909 had a Schmidt superheater from the start. These were numbered 2691 to 2700 and had their high pressure cylinder diameter increased from 340 to 370 mm. In 1924 they had become 230 B 1 to 160, and these numbers were still used by the SNCF from 1938. In 1928, the first five were fitted with another type of superheater. 

In 1937, the former 2693 was rebuilt in a radical way. Its main feature was a Velox boiler for more rapid steam generation that burned oil. The cab was moved to the front and the whole locomotive received a casing. It was designated 230 E 93 and became SNCF 230 E 1 in 1938.