I checked Thompson's SP boxcar book and there is no PE series for this car so it doesn't fall into PE cars from SP's Huntington Common Standard or Harriman Period groups.
The rather miscellaneous fleet of cars acquired by the "new PE" from the "old PE" and elsewhere are quite a complex story, well covered in several PE books, notably _Interurbans Special 37_ which forms Volume III of the complete _Cars of the Pacific Electric_ history. As those early freight cars were not directly SP heritage cars, I chose not to cover them in my SP car volumes. I did offer citations to the Interurbans Special.
