This set was produced to introduce an more comprehensive set for these classes.
Between 1919 and 1923, the PRR had 3,000 class H25 hoppers built. It differed subtly in appearance from the H21a, and was done so because of lessons learned from the H21, H22 and H24 class hopper cars. By the 1930's, there was over 5,000 of these cars on the PRR system. Starting in 1949 some H25's were rebuilt into class H25, which was identical to the PRR's
later H21g class. By April 1955 643 of the remaining 3,127 in service H25's were converted to H25a's. These cars, due to their age did not last into the Penn Central Merger era.
The H25 cars fell into many numbering blocks, with the most prominent being featured on the decal sheet, 169, 170, 172, 729. The H25a cars were numbered with a prefix of 249. This sheet has enough data to do 4 cars, 3 H25, 1 H25a. There are six different reweigh/repack dates cover locations system wide and multiple re-weigh dates ranging from the mid-1930’s through to the late 1950’s.
The H25 Class produced by two brass importers, Sunset and Railworks, while both are externally correct, on the Sunset version, the sides were pressed on a die, leaving an indentation on the interior of the car which isn't correct, however the Railworks version is completely accurate. In addition to brass, this class has also been done in resin by F&C. For modeling a member of the H25a class, one simply needs to use a Bowser H21a kit, with a non-reinforced top chord.
For references in regard to the PRR's H25 Class Open Hopper Car fleet please consult Pennsylvania Railroad Steel Open Hopper Cars, by John Teichmoeller and Volumes 1-3 of the PRR Color Guide.