Early PRR box cars

John Nehrich <nehrij@...>

I started noticing Pennsy box cars and it appears that their X29 was their
first box car with the door sliding to the right. Even their "heater"
(ventilated) box car c. 1893 had the main door on the left and the
ventilator door on the right. Anyone know of any exceptions off-hand? (or
is that left-hand?)

- John