PJ Watson is a traditional family business that has a pedigree spanning four generations. Its roots go back to the reign of King George V and a very different Hatton Garden to the one of today. In each generation the business has been run by qualified gemmologists. It is one of our smaller claims to fame that we have the unique distinction of four generations of F.G.A.’s. Our experience and years of service to the industry enables us to cater for the needs of the most discerning of buyers.e.