See:MTH/Proto. 50' PRR Merch. Serv. Box Cars:

'O' Gauge Forum Members,

As, 'O' Gauge Forum member: Hot Water previously posted regarding MTH's PRR LCL MS PI 50' steel PS-1, box cars. 

For All who are interested, please, be advised that I spoke with Patrick P. Petros, Prorpietor of PatsTrains of Wheeling, West Virginia and he has ordered some MTH PRR Merchandise Service, Phase One, 50' Steel PS-1 box cars, which will be available for sale hopefully in Apr. of this year.

Pats Trains telephone # 1(304) 232-0714

http://www.mthtrains.com/content/20-93582

http://www.billspennsyphotos.c...oto?photoid=60423799

The road numbers: 118573 & 118580, offered by MTH on their Premier item #20-93582, 50' PRR MS Phase One box cars, are prototypical. 

Thank you Hot Water and 'O' Gauge Forum members,

Ralph RJL