Here is the Weaver Models PS-1 PRR LCL M.S. PHASE THREE 40'(X29) box car:
http://bidderone.com/index.php?slb=1&itmpg=1&itm_id=533270
The road number IS NOT a correct number.
There, was only one prototype car listed, but the Weaver Models' model, is very close to the real car, but the real car was NOT a PS-1 and the prototype's road number was 504087, made by the PRR shops of an old X29 40' box car and wearing a plain color paint scheme, with a 1954 start of the (Large) "Billboard" style herald and PRR's. "Shadowed Keystone."
Ralph