This listing is for a set of 7 Athearn HO gauge streamlined passenger cars in Tuscan Red. All are in excellent condition and in their original boxes with knuckle couplers. HO Athearn Set of 7 Built Pennsylvania Streamlined Passenger Cars Boxed (49RX). The set consists of the following. Railway Post Office Car. Baggage 2 Coach Cars #4903 2 Coach Cars #4949. Please see the photos of this nice set of cars. Get images that make Supersized seem small. Showcase your items with Auctiva’s. Track Page Views With.