May have been succeeded by Down Bros. & Mayer & Phelps Ltd. by 1930s
1864 - Jos. Mayer, 51 Great Portland Street, London; 1869 - Mayer-Meltzer, 59 Great Portland Street; 1874 - Mayer-Meltzer, 71 Great Portland Street; 1886 - Joseph Meltzer dies
May have been succeeded by Down Bros. & Mayer & Phelps Ltd. by 1930s
1864 - Jos. Mayer, 51 Great Portland Street, London; 1869 - Mayer-Meltzer, 59 Great Portland Street; 1874 - Mayer-Meltzer, 71 Great Portland Street; 1886 - Joseph Meltzer dies