The Pennsylvania N5C Porthole Caboose No. 6437 was produced from 1961 until 1968. This TUSCAN painted caboose was illuminated with a clear window shell. Has WHITE "BLT 2-53" and "6437" heat-stamped lettering on the sides. There are two variations: Variation A: Early AAR trucks with one or two disc couplers. Variation B: Late AAR trucks with one disc coupler.