Micro-Trains - 502 00 600 - Boxcar, 40 Foot, Steel Plug Door - Ringling Bros. and Barnum & Bailey

Prototype History: Plug-Door boxcars are usually insulated and typically carry products such as canned goods that require protection from extremes of temperature but do not require refrigeration. Plug-style doors were normally used to ensure a tight seal in the insulation. Designed for transport of both perishables and large loads, plug doors allowed box cars to be sealed from outside dust and dirt. Cars like these were manufactured during the 50s and 60s.

Whether you consider this a reefer or a boxcar is a matter for angel-pinhead-counters. There seems to be a bit of a blurry line during the transition era between the idea of a steel ice reefer and an insulated boxcar. I guess an ice reefer was meant to hold ice for cooling but I doubt this is a cut-and-dry distinction. Modern "mechanical" reefers are a different breed as they contain a refrigeration unit which quite distinctly sets them apart from "boxcars".

Road Name History: Ringling Bros. and Barnum & Bailey Circus was an American traveling circus company billed as The Greatest Show on Earth. It and its predecessor shows ran from 1871 to 2017. Known as Ringling Bros. and Barnum & Bailey Combined Shows, the circus started in 1919 when the Barnum & Bailey's Greatest Show on Earth, a circus created by P. T. Barnum and James Anthony Bailey, was merged with the Ringling Bros. World's Greatest Shows. The Ringling brothers had purchased Barnum & Bailey Ltd. following Bailey's death in 1906, but ran the circuses separately until they were merged in 1919.

From Wikipedia

Brand/Importer Information: Micro-Trains Line split off from Kadee Quality Products in 1990. Kadee Quality Products originally got involved in N-Scale by producing a scaled-down version of their successful HO Magne-Matic knuckle coupler system. This coupler was superior to the ubiquitous 'Rapido' style coupler due to two primary factors: superior realistic appearance and the ability to automatically uncouple when stopped over a magnet embedded in a section of track. The success of these couplers in N-Scale quickly translated to the production of trucks, wheels and in 1972 a release of ready-to-run box cars.

Micro-Trains Line Co. split off from Kadee in 1990 to form a completely independent company. For this reason, products from this company can appear with labels from both enterprises. Due to the nature of production idiosyncrasies and various random factors, the rolling stock from Micro-Trains can have all sorts of interesting variations in both their packaging as well as the products themselves. When acquiring an MTL product it is very important to understand these important production variations that can greatly enhance (or decrease) the value of your purchase.