Can some one tell something for P. Orr & Sons and its guns?

My friend is selling an old Belgian made shotgun. He says it is retailed by P. Orr & Sons and it is in P. Orrs guncase, but I´m not sure is the case original. The gun is almost like new, but case is in poor condition.
Is there any way to find out is this gun originally retailed by P. Orr?
Fine gun and the price ins´t bad either, but it would be nice to know it´s history.