Watch List notes:

Mining interest: Royal Cornwall Polytechnic, James Watt silver medal, 1875, to 'The Diamond Rock Boring Compy for Diamond Rock Borer', 45.5mm.; International Exhibition of Mining, London, 1890, gilt-metal medal, 45mm.; France, Exposition des Sciences..., 1879, gilt silver medal, named on reverse to 'The Diamond Rock Boring Companies of London', 56mm., ornate wreath suspender, first two cased, all extremely fine (3)
The Aqueous Works & Diamond Rock Boring Company was founded by the entrepreneurial Col. Sir Francis [Frank] Bolton (1831-1887) in 1879, with offices in Victoria Street, Westminster. See previous lot.
(100-140 GBP)