LEGO Set - 139A - Train - Electronic Control Unit For the Train

I am selling this extremely rare LEGO 139A box, Vintage Electronic Control Unit (Forward-Stop); it was issued in 1969.
It is new, never used, the pieces have never been taken out of their boxes.
At the time, these LEGO boxes did not have cellophane or sealing tapes.
It shows signs of wear from storage.
This box was also meant to accompany box 138.
The shipment will be sent insured given the price of the LEGO.