Complex sentence: Whilst the Deutsche Reichsbahn still had 451 Prussian S 3 engines in its 1923 renumbering plan (as 13 008-458), only 27 of them remained in 1925 and were classified as DRG Class 13.0 with operating numbers 13 002--028.
Split into simpler sentences: Whilst the Deutsche Reichsbahn still listed 451 Prussian S 3 engines in its 1923 renumbering plan (as 13 008-458), only 27 of them were left in 1925. They were grouped as DRG Class 13.0 with operating numbers 13 002--028.