This handsome and huge-sounding instrument was made in the second half of the nineteenth century in the northern part of England. Competing with the viol model double basses made by William Tarr and his followers in Manchester, other makers from the north of England preferred to take their inspiration from the double basses made a century earlier in London. This instrument clearly shows the inspiration from old London with its English Stainer-style soundholes, wide purfling, and tubby arch. The head is a fine example of that made by Hawkes & Son and was most likely fitted during conversion to four strings.
If you are interested in viewing the instrument or would like to find out more details: