Drop-in interior for the Rivarossi Streamlined Observation Car, of the Pennsylvania Railroad POS21 class observation sleeper car. Based on Pullman plan 4133, http://prr.railfan.net/diagrams/PRRdiagrams.html?diag=pos21_fp.gif&sel=obsl&sz=sm&fr= , used in cars 8419 Mountain View and 8420 Tower View. Two master bedrooms, 1 double bedroom, porter's quarters, buffet/kitchen, and observation lounge area. Model cut into 4 pieces.