AHM UNION PACIFIC 510 NEW VINTAGE 5277F U P COLLECTABLE DISCONTINUED RAILROAD                                                                                                    From the Krauss-Maffei locomotive to the Helium Car, AHM certainly had a diverse and interesting product line in HO-scale trains. The company was a major producer of trains from the 1960s into the '80s. Take a look through the AHM site today and see some of the gems once offered!