However , the experiment was not followed on , and it was preferred , starting from 1929 , to outright convert the locomotives to Class 625 status .
In 1927 , the 600.168 was rebuilt with a superheated 625 boiler , and was reclassified as 601.168 .
The experiment was not followed on , and it was preferred , starting from 1929 , to outright convert the locomotives to Class 625 status .
In 1927 , the 600.168 was rebuilt with a superheated 625 boiler , and was reclassified as 601.168 .