The Pennsylvania N5C Porthole Caboose No. 6447 was available in only one Super-O set that was produced in 1963. Although this caboose has the plastic window shell insert, it was not illluminated. Painted TUSCAN in color with WHITE "BLT 2-53" and "6447" heat-stamped lettering on the sides, it came with early AAR trucks that has one disc coupler. There are no variations.