SVRy 50 a 4-6-0 was built with one sand dome forward and sander lines are shown for forward and backward. Photos of the engine in service on the SVRy show the back up line removed. Photos of the engine in Peru show that a second sand dome was added just ahead of the cab where the dynamo had been which was moved to just behind the head light. The curious thing about what was done in Peru is that the line from the rear dome drops down to the front side of the 3rd drivers.