Found at Live Auctioneers. Description: “Painted cast iron original double wheel generator to provide the power to Knapp model trains and trolleys. In talking to various collectors we feel this is the first Knapp toy train generator to have surfaced and it is in near perfect state. The top of the motor sports the Knapp name plate; this piece appears in the 1908 Knapp catalog 16″ l. , 12″ t.”
