I've visited the following Pennsylvania Railroad model railroads and consider them to have a high degree of fidelity to the prototype. They are not freelance, protolance, etc., but depict specific locales on the Pennsy based on historic documentation.

 

 
1951 Division Locale Era Modeled Modeler Photo
Maryland Baltimore   Ken Myer
Bel Air MD
meyer
Maryland Baltimore to Wilmington 1967  Don RIchard
WIlmington DE
33141805 10216782534705041 1846090232173166592 n
Philadelphia Terminal 30th Street Station, Zoo   Charles Chandler II 23915835 1930394650308130 1448500818339103421 n
Philadelphia Terminal

Chestnut Hill Branch,
Stifftown Branch

  Ron Hoess  
Philadelphia Terminal Canal Street Branch   Ron Klais 18767642 1435054549889609 5332160248128994142 n
Philadelpha Terminal North Philadelphia,
Frankford Junction
  Peter Forbes Pete Forbes v15
New York Division  Elizabeth   Andy Rubbo 6ad4d61890db198aa940e6badc402c7d 
Middle Division Denholm   Railroad Museum of Pennsylvania
Strasburg PA
 
Middle Division Lewistown, Granville 1950s Jerry Britton
Etters PA
 
Middle Division Lewistown Secondary,
Milroy Secondary
1950s Jerry Britton
Etters PA
 
Middle Division Altoona 1952 Dave Johnson LayoutAtAGlance
Middle Division Altoona  1950s Larry Reynolds img 0412 1000x750
Middle Division Altoona   Ken Rideout
Philadelphia PA
 
Pittsburgh Division Horseshoe Curve 1950s  Larry Reynolds img 0446 1000x750
Pittsburgh Division Horseshoe Curve   Ken Rideout
Philadelphia PA
 
Pittsburgh Division Tunnel Hill   Ken Rideout
Philadelphia PA
 
Susquehanna Division  Harrisburg to Buffalo   Ken McCorry
Downingtown PA
p9260134 1002x750
Panhandle Division     Curt LaRue
OH
LaRue