Mount Vernon Shops has released HO scale decals for GLA hoppers in the Shadow Keystone scheme. John Frantz writes:
This set was produced to introduce an more comprehensive set for these classes.
Beginning in 1909, the PRR introduced the H21 class of hoppers; by 1951 the class had peaked with a mammoth count of 39,699 cars. Known for its longevity in the fleet, this car became a signature of the Pennsy’s coal trains. This class of car was rebuilt many times throughout the years. Some of these cars lasted to the end of the PRR in 1968. However, most were scrapped by Conrail.
The H21 subclasses were in many different numbering blocks, with no discernible documentation of what numbers were assigned to each class, instead only total fleet numbers given.
This set contains enough data to do 6 cars in the Shadow Keystone Scheme. There are eleven different reweigh locations P50 (Enola), P57 (Altoona), P62 (Holidaysburg), P125 (Weigh Scales, PA), P165 (Girard Point, Philly), P203 (Pitcairn), P205 (Pitcairn), P251 (Scully), P440 (Ft. Wayne), P628 (Columbus, OH), and P752 (Indianapolis, IN) covering the entire PRR System and eight different reweigh dates ranging from the mid 1950’s through to the early 1960’s.
The H21 class has been produced in plastic by Bowser and resin by Westerfield.
For references in regard to the PRR's GLa and GLg 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.