It looks to me like a decent enough car- use it as a mow or training/ education car that gets spotted at odd stations; special military or whatever; with a decent coat of matt spray I'm sure it will look ok.
I thought one end looks like one of the later big-window observation/lounges, but you say its unmodified.
But then I like quirky, now back to sleep...
cheers d
The car that the Rivarossi baggage (which the model in the original post was bashed from) is based on was an ATSF baggage car that was rebuilt from a baggage-lounge that had large windows and a vestibule- the windows and doors being plated over in the baggage version. The Rivarossi combine cars are also based on ATSF prototypes, and the prototype combines were also rebuilt from baggage-lounge cars, with the vestibule and some windows retained, and other windows plated.