Hi Charlie
In the 1931 catalog Lionel lists outfit number 409E which had a 381E electric type locomotive and three state cars (the state set)
In the 1931 catalog Lionel lists outfit number 368Ewhich has a 390 steam locomotive two 424 illuminated Pullman coaches and a 426 observation car. They call this the Pennsylvania Limited so these would be Stephen Girard cars but they specifically say two 424 Pullmans no mention of car 425
In the 1932 catalog Lionel lists outfit 370E with a 392 steam locomotive 310 baggage car 309 Pullman and 312 observation car.
In the 1932 catalog Lionel lists outfit 372E The Pennsylvania Limited with a 392 steam locomotive and cars 424, 425, 426 the three numbers for the two tone green Stephen Girard cars.
Hope this is helpful
Sincerely
Frank