I don't usually answer my own questions but took a second look at the literature I have and this turned up. These are snips from an 1886 "FAO Schwarz Toy Bazaar" advertisement (Brooklyn, NY) reprinted in the 1971 "Toys, Dolls, and Games" book. While the "Hero" and "Ajax" engines are illustrated, the "Empire" beam engine is not shown but is described; this is definitely the engine in the photos above. Schwarz sold toys from many different makers including Buckman.