Not likely, I'd run a mile the other way.
Brough's in the vintage movement are like Myford's, not necessarily good but well known and because of this have the aura of the name.
Helped that Lawrence of Arabia owned one and the aura was added to when he was killed on one. Mind you the cynics could say that's how bad the handling was, that it was worse than a camel.
George Brough was a showman through, through and through and this helped the mystique.
In the case of the SS models though they were just assemblers of motor cycles like many in their day. They did make the frames from bought in tubing, bought in fittings, the tanks and other tin ware.
Everything else was made by others, the engines were JAP fitted with a Brough timing cover. Forks were Druids, wheels by the Birmingham Hub company, Sturmley Archer or Burman gearboxes
Ironically Matchless made an almost identical motorcycle at the time but it did have a matchless engine. Many said it was as good or better than the Brough but they will fetch nothing like in a sale room