O so I was right? If you look at the picture the gantry is about half the size of the guard rails. There is no drive rails. So unless this unit was designed to wash smart cars in the 80S OR 90S then theres no reason for it to move. Meaning it's just another stationary drive thru dealership wash. Also the fact there is no energy chain, everything is hard piped, no treadle, and separate rinse arches is a dead give away.Okay, sorry for the spam, but this looks EXTREMELY SIMILAR to the Broadway Stationary Drive-thru down to the Rinse Arch.
Perhaps this is an older Broadway? The Stationary drive-thru PDF shows a very similar looking rinse arch and near identical machine (albeit with some differences)