Portrait of Matthew Boulton (1728-1809) J.S. Schaak (1761-1769)

The picture has something of this: people, wear, portrait, music, man, outfit, royalty, jewelry, outerwear, retro, necklace, musician, jacket, menswear, leader, monarch.
Perhaps it’s a close up of a painting of a man in a black coat with a white ruffled collar and white hair wearing a black and gold jacket.