O gauge tinplate type loco.tested with DC power ,it runs with a light.I did not test with AC power,as im not sure if it would harm it.Great Northern road name. After researching it,I think it is a Westinghouse 60 ton loco. Marked David O King underneath .If there is no interest im probably just gonna keep it and display. Avery rare model. .Due to the nature of this,I cant guarantee parts count so it is being sold as is with no returns  Buyer pays 21.95 for  mail insured Shipping.lot G10