The model shown below of road number 220187 is by S-Helper Service, Inc., part number 01907. It appears to be a very accurate model. The model weighs 4.1oz (116g). This is a little light according to the NMRA standards (it should be close to 5oz). The couplers have been replaced with HO-scale Proto Max ones. Scale wheels have been installed as well.
(external link: Prototype Information)