1990 National Bus protect

1990 Bus made by National. Diesel pusher 5.9 Cummins with automatic transmission. New brakes, tires, batteries last year. We’ve put maybe 500 miles since then. Has a bathroom no shower. Two pull out couches, plenty of seating, small refrigerator with inverter. Currently registered as a camper. True mileage unknown. Runs and drives fine, just not very fast. Top speed is around 60 mph. Originally some kind of transport bus from Connecticut. Needs some updating of electrical system but functional as is.