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Patent Nut and Bolt Company initially of Victoria works, Rolfe Street, Smethwick; later of London Works, nr Birmingham.
1862 All fastenings for the "immense structure" of the International Exhibition were supplied by the Patent Nut and Bolt Co, the premises of the late firm Fox, Henderson and Co, London Works, now in the possession of Messrs Watkins and Keen; Watkins had arrived in England about 1856 from America; the works had become one of the largest of its kind in the world, covering more than 4 acres and employing 500 people. The contract for the Exhibition had been granted largely on the basis of the uniformity of the product arising from machine production.
1865 Partnership dissolved. '...the Partnership heretofore subsisting between us the undersigned, Francis Watkins and Arthur Keen, carrying on business under the style or firm of The Patent Nut and Bolt Company, and also as Engineers, under the style or firm of Watkins and Keen, at the London Works, at Smethwick, was this day dissolved...
Developed various machines for the manufacture of bolts and nuts, which they used themselves and sold to others
1867 Directory entry as manufacturer of nuts, bolts, spikes, rivets, etc, and makers of proprietary machinery for making all of the above. Address: London Works, Ward End, Birmingham (late premises of Fox, Henderson and Co); the works also described as at Smethwick covered 8 acres; company employed 1000. Also at West Bromwich, and Cwm Bran works, Newport.
1869 Advert for their goods. Works listed as London Works, Birmingham; Stour Valley Works, West Bromwich; and Cwmbran Works, Newport, South Wales 
1881 Advert. Brands - W & G. P.N.& B Co. Globe and Lion. Medal Winners London 1862; Paris 1867; Vienna 1873; Philadelphia 1876; Paris 1878; Sydney 1880.
1894 Exhibited at The Antwerp Exhibition. 'Every description of bolts and nuts, black and polished and galvanised, of iron, steel, brass, gun-metal and copper, from the smallest size up to 3.5 inch and 4 inch diameter'. Awarded Gold medal for metallurgy and for Railway Plant.  
1900 Proposal from Arthur Keen, the chairman for the reconstruction of the company by amalgamation with the Dowlais Iron Co and Guest and Co (2); this would give the company its own coal and iron supplies and a diversified range of products; the company would be called Guest, Keen and Co