Solid Brass Standard Scale Pre war ? Marklin ? Lionel ?

I have a Rare Standard Gauge Solid Brass Engine and Tender for sale. It has pre war lionel pick ups, wiring, direction switch and possibly motor. The pick ups are located on the tender and the motor is in the engine. It is an almost exact replica of the world famous Empire State Express loco #999 of year 1899. I have been told it is probably a one of a kind and for years I have had no luck in identifying it. Ive even contacted the National Toy Train Museum and no one t could help. It does come with a custom made Brazilian cherry display stand.

If anyone can help in identifying this loco it will be greatly appreciated.

Please see pictures for details and feel free to ask me questions about this item.