Traded at 25 Union Street (1850-61), 1 Union Street (1864-74), 23 Nethergate (1876-80) & 65 Reform Street (1882-1900), all Dundee, Scotland. May be son of George Lowden senior as 'Jumbo' microscope at A56557 was made for the 1862 exhibition is signed G. Lowden Jr.